No save your money and engage the services of a Gas engineer who specialises in your make when/ if your boiler goes faulty.
BG take ages to send someone out who inevitably wont be trained or kitted to repair anything other than a simple fault. You’l wait days for parts and then they will eventually fix.
Sisters boiler went faulty last week. so far they have taken 4 days to come and tell her that they think its the expansion tank and that they’ll need to get a part. Living in Scotland you need heating and hot water at this time of year.
I called the loacl saunier duval engineer and it was fixed that day as he had parts on his van.
DONT WASTE YOUR MONEY