OK, so under the following conditions:
1 x Very old fridge freezer on 24/7
1 x Microwave sat doing nothing except pretending to be a clock !
1 x PC on 24/7
2 x PCs in STBY
1 x Router, Switch, Hub, two Modems & a few other bits/pieces on 24/7
2 x SAT receiver in STBY
1 x DVD recorder in...