You can see the window profile below:
The leak is happening below where the apron is.
Had a 'builder' come down and said the water is going through / up the apron and leaking though. He put some solvent along the edge of the apron to stick it down, which has stopped the majority of...
There is some heat coming !
The screws on the red ones were down / turned off !
On the taps for the red ones it says L/min but I cant make out any readings. Is it supposed to change colour or something to say what the flow rate is?