I just had my sr5 reprogrammed to take new £1 coins plus the new 5p's and 10p's as I never bothered when they came into circulation.
I used this guy http://www.ebay.co.u...=p2047675.l2559
I rand him from one of his listings on ebay, he's a really nice bloke to talk to and done off ebay and money sent as a gift via Paypal he charged me £16 including return postage.
I posted the mech to him on Monday tea time and it arrived back this lunchtime, stuck it in and tried it, not one coin rejected everything going to correct exits with original routing plug in I'm so happy with the deal I thought I should mention it here.
He will also do mechs while you wait if you're close to him, but you need to ring first to arrange a time and day etc.