If you’d rather not commit to a contract or SIM only option, check out this Three PAYG SIM. The All in One £15 deal gets you 3,000 texts, 300 minutes, and all-you-can-eat data.
Three’s 1-2-3 PAYG rates apply, so that’s 1p/MB, 2p/text and 3p/minute outwith your allowance.
Standard SIM, micro-SIM and nano-SIM available.
(Thanks to Reeeevsy at HUKD)