xbox live subscription

£75 per month

if you do it through the dashboard its between £40 and £50, cant remember exact amount, but you can pick up a 12 month code from sainsburys i think currently for £29.99

vlj

£75 per month

Isn't that without VAT?

amazon.co.uk/Xbo…1-1

£29.97 price found for a 2 second search on google

it almost certainly will say. if your signing up through the xbox dashboard don't, unless theres a tab offering you a deal. recent offers include 3 months for £6 and 12 months for £24.
If your extremely unlucky and havn't been offered a deal via the dashboard then buy a pre paid card for around £30. I'm sure someone will be along shortly to tell you where the cheapest place to get one will be.