Hiya
As already pointed out by the very capable QG and Expat in Scotland, theres a number of variables so it's very difficult to even give ballpark figures.
In addition to those variables theres a few more - is the boiler old? or a recently installed more efficient model with Corgi cetification to prove safe and proper install? is the property well insulated? (thats in conjuction to which floor its on, ground floor flats cost more as heat rises) do you have lots of 'large load' electrical items such as Big fridge, freezer, clothes drier, dishwasher, kettle, microwave, electric showers? and then all the secondary type load items, Tv's & peripherals, Computers and peripherals, personal electrics and then all the 'smaller' drain items - mobile chargers, clock radios etc etc.
for Gas, do you do alot of home cooking? family members number? a tip I always read about is to turn the thermostat down maybe a couple degrees to keep a slightly lower even temperature and the 'extra' layer clothing thing in addition to that, it always makes sense to analyse heating requirements and set the timer to match accordingly.
Energy costs are predicted to rise in the longer economic view, but in the short term with the price wars with the various energy companies, you should find 'switching' relatively easy if you find better deals elsewhere.
Cheers! DtM! West London & Slough UK!
