Salvageable imo. Might need a new back rail, but ultimately looks like the condense hose has failed (common on this year/model), it even looks like it’s not attached and, if that’s the case, then your boiler man should have turned the boiler off and issued a do not use sticker and warning...
I only saw a bit of it last night. There seemed to be some bias towards Uraguay, and there seemed a lot of shoving. Uraguay deserved a conceded goal after that GK blunder - was it David James in goals? :ROFLMAO:
Yes it can be reduced in size to not less than 75mm for single or 2 storey properties. Or perhaps change the air admittance valve on the other one for the 110mm on existing and vice versa.
Contact your installer would be first port of call.
I don’t hold oil fitting qualifications, but sounds like it could be combustion related, so possibly plausible. My advice is to stop using it immediately, you could have a carbon monoxide issue.