This deals been missed as a post and appears a bargain for light users wanting extra data. The + value in this deal is as a price match with your existing provider (e.g. EE). Game over @ Tuesday midnight.
1GB data / 250 minutes /500 texts £5.00 per month
30 day Sim Only contract
Proud to use the EE 4G network
UK customer service
Whilst mentioned in comments of other Plusnet deals but not in an OP I thought this worthy pointing out, as it might allow people to cut their monthly bill. Credit to Wildecat for the tip off.