Wow, Chris,
No - bits had been replaced on the boiler during its life (can't remember what exactly), but not the radiators.
The engineer was at the property for a day and a half, and told me on the first day the boiler had been installed and the flush done. He went back on the second day to tidy up the flue outside. It's only a one bedroom flat with only 4 or 5 radiators in total, so I'm hoping he did everything right. The boiler is in now so I suppose only time will tell. I found the guy on the Worcester Bosch site when I put in my flat's postcode - haven't used him before. Plus, I couldn't be there as I'm a childminder and have children with me all week (then I've got my own two coming in from school).
I was in a flap and had to get the work done quickly as the boiler died, the tenants were rightly doing their nut with no heating in January, and it took me a week of trying to get permission from the management company at the flat (then getting it refused) for an external condensate pipe to be fitted.
The guy in the flat downstairs is a Director and was kicking up a fuss about any internal installation, insisting the pump should be completely inaudible from anywhere outside the flat (therefore in his flat downstairs). So I went with a Worcester Bosch engineer so that I could show I'd done everything in my power to ensure it had been installed by an expert. (Even though the initial guy that was going to do the job does work for my estate agent and is their trusted guy who I would much rather have used. Plus he would have been a grand cheaper.)
I'll just have to cross my fingers and hope for the best. Apparently, it's got a 10 year guarantee (which I'm waiting on coming through), so hopefully I'm OK.
Maybe when this tenant moves out, I'll get it powerflushed to be on the safe side. If you're anywhere near North London, maybe drop me a PM. Thanks again. Sounds like you do an amazing job.
Thanks for taking the time to respond, though. I really appreciate it.