So basically the ovens are revolting. I did buy a cleaning kit and after several hours I really cannot see a discernible difference. So decided to get some quotes for professional cleaning. Two built in singles and a freestanding double. They have come in at £190 and £220 so far. Does that sound right? This is something I had never contemplated before, hence the revoltingness.
As a side thing, I bought an oven with a pyroclean function - amazing - worth the extra when you upgrade. I'm moved house 6 months later 😬😬😬. I use oven pride myself, but I have time to do that. It's £35 up in the NW.
Initially I thought that sounded expensive, but for two singles and a free standing double it's probably about right. c£40 here for a single, c£55 for a double (the big bottom bit & half size grill bit at the top), excluding hobs and grill pans. I'm Surrey / Sussex / Hampshire border.
I ended up buying a pyrolytic oven and use Oven Pride very rarely on the other bits (about every 6 months ish).
My cleaner does it as part of routine stuff when she comes to my house every fortnight....(£50 for 2 hrs work for her and her sister to clean the house and do anything else that needs doing!) Only started getting cleaner as I'm off work and immunocompromised.... best £100/month I've spent in 33yrs of employment!