A few times now my combi boiler (condenser type) has made a vibrating noise a bit like a pneumatic drill for a few minutes and gone off again. Otherwise it is working perfectly. This time I was next...
16 down. Clue: Variety of open-capped mushroom used for stuffing (10). I have: P?R?O?E?L? I thought this would be easy to find but is proving elusive. Help please.