i was pricing parts for this relic and could not believe the price of a mechanical clock £71.50 at my local parts retailer and the price of a isolating valve,(ch pipework to boiler iso valve),£16.40...it is leaking from the slotted centre were you open and shut them,annoying.also plastic facia hanging off£65.60...then you have labour costs..your at least a couple of hundred quid in..i have mentioned this and it might be better with a new boiler but yey not my choice you can only offer your advice.