What a bonus, facing due south too.
Do you want to know the best bit.... if you could see inside the window under the tubes..... there's the cylinder. bless.
The bad bit: some 'plumber' had installed a 250,000btu boiler going full pelt with a huge nozzle...... we did the calculations and the peak load is actually 140,000btu. Same idiot put in a 500l cylinder, for a 3 bedroom house with three occupants. These lazy sods want shooting.
Why do people ask 'plumbers' to do heating work?


??
Rant.