OK, I know mobiles tend to go cold but here goes,
Needed a new contract mobile as just cancelled "3" contract, only using 200mins/texts max a month so looked around, as the Vodaphone 100mins/500texts finished last month I found this the best available £10 call/text contract although "3" are currently doing a 500min/text 18 month contract for £13.50 but the phones are rubbish.
£10 a month for 18 months = £180 + £4.88 delivery - £30 Quidco (mine tracked & validated in 4hrs for payment next month) = £8.60 a month or 4.3p a text/call.
Nokia 5530 handset gets excellent reviews, http://www.techradar.com/reviews/phones/mobile-phones/nokia-5530-xpressmusic-624950/review
When ordering the site allows you to pick a day a few weeks in advance which was handy as I didn't need mine until 18th Nov.
Today is the last day at this price, hope this helps someone.