£3.75 for 300min/600mb
5 for 500min/1GB
I have ordered mine via Quidco - hope 35 cashback works!
SIM Discount Promotion
50% SIM discount for Small and Medium Plans: A 50% discount off the package price for 12 months can be redeemed using the code SecretSale2 only when you sign a 12 month Small or Medium SIM plan contract. Offer is not available in conjunction with any other discount. Offer is available until the 06/08/2014. Discount can be redeemed by entering the code online at mobile.talktalk.co.uk.