D
Deleted member 105431
I reckon you can find a decent local RGI that will do a service and fit a magnaclean for around £200 and if it is in conjunction with the job, do a chemical flush for another £100.
If your boiler and system are of reasonable quality and not too old, you should have no real need to pay about £200 a year for insurance.
Direct debit the money into a savings account, and have an annual service in stead. With a bit of luck, your savings will cover the best part of the price of a quality new boiler by the time you need one.
good advice.