Sim only deals? Possibly Giffgaff?

[lolsteve]

Was with Giffgaff for years, couldn't fault them. Back when they used to offer unlimited internet on their £10 sim I abused it when moving into our first student place which had no internet for a month, used 45gb and never once did they complain....except the message a few months later saying "1% was using 95% of the internet banwidth so we're changing to 1gb for £10 "
Even still was really handy just being able to turn off and switch whenever