I agree that it's available in RG23 7JA (which is an RFoG area), but I can't guarantee it is available across the whole of Oakley. "It's Southampton only right now" is clearly nonsense, because it's in half of Manchester, as well as Reading.
PM me your full postcode if you want me to specifically check.
Must admit I haven't heard it called "M1000" before. Try asking for "Gig1" instead
https://www.virginmedia.com/shop/bro...abit-broadband