Hope this is posted in right section, but here goes :
Signed up for a new 18m contract with Vodafone about 5m ago on their £35 pcm for 500 mins and unlimited texts.
Called one of their Cust Services guys (Niall. Really nice bloke) and he has changed me to an extra 100 mins a month and reduced my monthly bill to £25 including ICS which I was paying £2.50 per month previously.
So a net saving of £12.50 a month for the remaining period and extra minutes.
Might be worth someone on a similar tariff to the one I was on, making a call to save themselves a few quid each month.