Open padlocked fence and roll the LEFT section of the fence to the side.
Unlock the small house
Retirieve the keys for the main house as well as the tarpaulin
Use the tarpaulin to access the water-meter and turn on the water
Enter the main house - lift the main door to release the lock !
Turn on the power for the site
Return to the small house
Switch on the power to ALL BUT fuse 1 (water heater)
Turn on the water (main tap in the toilet)
Run both hot and cold systems until steady flow of clean water
The water heater can now be started when desired (but note total power draw is 45A, so if the radiators are required, then delay this until the house is warm