Hello everyone, Just wondering if you could help please! My boyfriend mike lives on a boat. We're currently off on holiday in a cottage in Derbyshire, and he can't remember if he turned the heating off before we left. It's an Erberspracker heating system, that runs off diesel from the engine. He definitely did not leave the engine on. He thinks it had half a tank full of fuel when we left. We were just wondering...what's the worst that could happen if he did? Will he just lose a tank of fuel (which wouldn't justify driving back to *****) or will it damage the heating system somehow? I'd be super grateful for your advice so we can decide whether to head back to London in a hurry, or relax and head to the pub! Thanks in advance, Jen