That's what I thought too but nope, no questions asked at all.
I assume you must had proof that its been serviced each year? Otherwise they could say the boiler has not been looked after.
The house we bought has a worcester boiler. I didn't have the installation details or receipt but guessed it might have been 7-10 years old. Last month had some leaks/problems, plumber came in and said heat exchanger was damaged and would need replacing. Replacing the entire boiler would probably be more economical. So I gave worcester a call, they tracked the age from the serial number to be just under 10 years old. Then sent out a repair guy same day, replaced heat exchanger under warranty plus upgraded a bunch of parts with no questions asked, zero fuss and only charged a nominal amount. So now I effectively have a new boiler which should last for many more years. Will definitely go for Worcester in the future.
Baxi DuoTec are really good
They're cheap and usually last a few years, throw em in to sell a house, prob ok if you keep up to them but when they start going wrong theyre ripped out and another put in as its cheaper then parts and labour