Not answering as she might be in the bath Hopefully @art b isn't about with his Matey (for all you radio fans).
*drum roll please* Yes, indeed it is. I've just got in from work, and the heating controller is saying 16c rather than 11c; happy days! Thanks @rustbucket for the advice and diagnosis. Condensate pipe insulation is arriving tomorrow.
Glad to have been of service. If you really want to show your appreciation for me saving you either a. A long wait for BG or b. Several days of no boiler then my invoice of five pounds can be paid at any one of your favourite charity boxes.
Its what they wear when climbing on to a Wheelie bin... I believe it a specialist thing for some customers..