Volvo wouldnt start last night. My one, that is. Everything lights up, but zip response to the key.
Tried the spare key, bingo! All is good.
The spare key is as new, totally unused. The key that has died looks like something Tony Robinson and his mates dug up. It has had a hard life, and has been through the washing machine at least once during my ownership

Nevertheless, it still opens to doors and the like, but the lack of starting suggests to me the glass transponder chip is U/S.
Rang a local bloke whose website proclaims he can repair and reprogram such things, but he doesn't answer. Next time a small business person bleats about business being bad feel free to kick them in the plums/lady garden and tell them theyd earn more money if the answered the phone.
Not liking having only one functioning key I rang Bells Volvo, and they relieved me of £298 for a new one. That includes programming, so some small consolation.
Its painful, but its one of those things. The car itself is still mighty and strong, so its worth the outlay. If one thinks about it, £300 is barely a single months repayment on some sheety little hatchback on PCP, so I'm still well ahead of the game. The car was £48,000 in November 2008, which is still 800 sheets a months over 5 years at zero %, so put in perspective 300 is a ballache but I can't really grumble.
V5 and my D/L photo'd and emailed to Bells, key ordered, new one should be here next week.