Due to changes in ward boundaries, some new wards are divided among several old constituencies (though never between two new constituencies). Such wards are shown divided into several parts, called [1], [2], and so on.
Election results from a recent local election are given. This is usually the local election from 2003, 2004 or 2006. For multiple-member wards, the votes shown are the sum of the votes cast for all candidates of each party. A negative number indicates candidate(s) elected unopposed. Where zero votes are shown, the ward is not needed because the entire old seat is unsplit.
Calculation method: There are two problems with using the raw (actual) local election results to imply general election results ward-by-ward. Firstly, turnout can be different between local and general elections, which means that the total number of local votes cast does not equal the number of votes cast in each old seat at the general election. To correct for this, we adjust the local votes to match the general election turnout. Each ward's result is scaled, whilst keeping constant the percentage support for each party, so that the total turnout adds up to the old seat's general election turnout. All wards in the old seat are assumed to have the same percentage turnout.
Secondly, even though we now have the correct number of votes in the old seat, the party totals will not match the general election result. Some parties do better at the local election than the general election, and others do vice versa. We call these strong and weak parties respectively. The next step is to transfer votes from strong parties to weak parties. This is done by taking votes proportionally away from strong parties and putting them in a transfer pool. For instance if a party got 12,500 local votes, but only 10,000 general election votes, it will lose 20% of its votes from each ward. These votes in each ward will be put in the ward's transfer pool and allocated to the weak parties. Weak parties will get votes transferred to them in proportion to the votes they need over the old seat. For instance, if two weak parties need 4,000 and 1,000 votes respectively, the first party will get 80% of each ward's transfer pool and the second party will get 20% of each ward's transfer pool. The transfer of votes between parties is done on a ward-by-ward basis using these common percentages.
More details of the calculation formulas are available.
The old seat(s) needed are:
| Actual Results | Turnout-adjusted Results | Transfer-adjusted Results | |||||||||||||||||||
| District | Ward | Electorate 2005 | Old Seat | New Seat | CON Votes | LAB Votes | LIB Votes | NAT Votes | OTH Votes | CON Votes | LAB Votes | LIB Votes | NAT Votes | OTH Votes | Total Votes | CON Votes | LAB Votes | LIB Votes | NAT Votes | OTH Votes | Total Votes |
| Neath and Port Talbot | Aberavon | 4,222 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Baglan | 5,535 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Briton Ferry East | 2,400 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Briton Ferry West | 2,186 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Bryn and Cwmavon | 5,139 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Coedffranc Central | 3,035 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Coedffranc North | 1,851 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Coedffranc West | 1,702 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Cymmer | 2,146 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Glyncorrwg | 895 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Gwynfi | 1,109 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Margam | 2,232 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Port Talbot | 4,283 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Sandfields East | 4,933 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Sandfields West | 5,046 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Tai-bach | 3,708 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||||
The transfer table below shows the votes cast in the old seat of Aberavon at the general election, as well as the total local turnout-adjusted votes. The number of votes to transfer, shown in the fourth and fifth columns, are the difference between the general and local votes. Strong parties will have votes transferred away, and weak parties will have votes transferred into them. The final column describes how votes will be transferred away from or into that party on a ward-by-ward basis. If a party is too strong, it will lose a percentage of its votes in each ward which go into that ward's transfer pool. If a party is too weak, it will gain votes from each ward's transfer pool in proportion to the number of transfer votes it needs over the whole old seat.
| Party | General Election 2005 Votes | Local Election Turnout-adjusted Votes | Votes to transfer away | Votes to transfer into | Ward Transfers needed |
| CON | 3,064 | 0 | 0 | 3,064 | Transfer in 10.2% (= 3064 / 30104) of ward's transfer pool votes |
| LAB | 18,077 | 0 | 0 | 18,077 | Transfer in 60.0% (= 18077 / 30104) of ward's transfer pool votes |
| LIB | 4,140 | 0 | 0 | 4,140 | Transfer in 13.8% (= 4140 / 30104) of ward's transfer pool votes |
| NAT | 3,545 | 0 | 0 | 3,545 | Transfer in 11.8% (= 3545 / 30104) of ward's transfer pool votes |
| OTH | 1,278 | 0 | 0 | 1,278 | Transfer in 4.2% (= 1278 / 30104) of ward's transfer pool votes |
| Total | 30,104 | 0 | 30,104 | 30,104 |
After transfer adjustment, the totals for each party over all the wards match the general election vote in the old seat.
| District | Ward | Electorate 2005 | Old Seat | New Seat | CON Votes | LAB Votes | LIB Votes | NAT Votes | OTH Votes | Total Votes |
| Neath and Port Talbot | Aberavon | 4,222 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Baglan | 5,535 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Briton Ferry East | 2,400 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Briton Ferry West | 2,186 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Bryn and Cwmavon | 5,139 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Coedffranc Central | 3,035 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Coedffranc North | 1,851 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Coedffranc West | 1,702 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Cymmer | 2,146 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Glyncorrwg | 895 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Gwynfi | 1,109 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Margam | 2,232 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Port Talbot | 4,283 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Sandfields East | 4,933 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Sandfields West | 5,046 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Neath and Port Talbot | Tai-bach | 3,708 | Aberavon | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | Aberavon | 0 | 0 | 0 | 0 | 0 | 0 |
This seat was actually unchanged by the Boundary Commission, so these calculations are shown for information only. The actual general election result for 2005 should be used for this seat.