Is it safe to operate a Glow Worm combi boiler?

If it is a slow water leak you should be ok for a few days. have a look at B&Q's combis. They are selling Ravenheat at silly prices with a three year guarantee (�499). you can also get 10% off if you or a friend/relative is over 60 on wednesdays. Get a competitive quote from a CORGI installer to put it in and you will save a chunk of cash.