Hi, I realise this is a considerably late answer to your question - but you should send your 690 to a service centre. They can install the latest version of the coinset for you. In the case of a 690, MEI (now CPI) have listed it as obsolete for a long time now, but they did release a coinset that has the new £1 on it. It’s programmed as a seperate coin to the old £1 and so the old £1 can be inhibited seperately to the new £1. You can find on the CPI website their approved service centres in the UK. I work for one and so could only provide biased info on who to send to for reprogramming