Berkshire accent (pronounced "Bahrk-shur").
People who've never been to Reading, or met anyone from Reading might think they speak with a London, Cockney, 'Estuary' or 'Southern' accent. Not unreasonably so, because, as the crow flies, Reading is only 34 miles from central London and 20 from Heathrow. With the A329(M) and M4 this means central London's about 50 minutes away (less than 40 miles from eastern parts of Reading). Heathrow is half an hour's drive.
Look at a map: towns between Reading and London are noticably closer together than to the west, north or south from Reading.
Infact Reading people speak with a version of the 'rural' accent that exists throughout southern England (except London and the West Midlands).
Pam Ayres is the most famous example of the accent, but she's from the Vale of the White Horse (Faringdon) so speaks more broad.
Ricky Gervais is from Reading (we hear more of him nowadays than Pam Ayres, so he is the best famous contemporary example) and has kept his accent, despite spending a lot of time in London and America.
"Air ace" they mean "Our house" not a Battle of Britain pilot! "Daiown the taiown" means "Down the town" and "Lunden" is the capital, not the Cockney "Lahn-dan".
Like a lot of local accents, it is threatened by outside influences.
Many residents of Reading's suburbs close to the A329M and M4 motorways work in east Berkshire, Surrey, Heathrow, west London, etc. and consequently shop and socialise in these places, so they could live in Reading for years, without meeting a local (or thinking the few locals they meet are probably from the west country, or East Anglia). Newcomers to Reading might correct their children's speech if they find them picking up Berkshire. Teachers from outside the area might similarly try and cleanse or dilute Berkshire from their pupils' voices.
Youngsters might be influenced by London accents from TV, radio, pop-stars, actors, etc. & cultivate it as they might associate the Berkshire accent with 'old' people, bus drivers, postmen, tradesmen and those in dead-end jobs.