Envelope A is the envelope that the elector returns their ballot papers in. It is marked with the letter 'A' and the words 'ballot paper envelope' in English and 'Amlen papur pleidleisio' in Welsh
Envelope B is the envelope that the elector will use to return the ballot paper envelope and the postal voting statement. It is marked with the letter 'B' and the address of the Returning Officer
The postal voting statement contains the elector’s name, the number of the ballot paper issued to them, instructions on how to vote by post and space for the elector to sign and provide their date of birth