If you get a cheaper (£12.90 a month, say) plan with AYCE data, do they throttle the speed if you go above the stated 1GB limit? Is tethering allowed?
At the moment, I'm with Tesco Mobile for £12.50 a month 1 year SIM-only contract (1GB, 750 minutes, 5000 texts) which is due for renewal in December and has out-of-bundle charges. TM T&C do not allow tethering but their customer rep. told me that they don't bother monitoring it because of the excess data charges. I find tethering to be very useful when I visit family members who don't have an internet connection.