Efficient use of GFCH

[Jbird]

My neighbour has an average combined gas & electric bill of £70 per month. I have an average combined usage of just over £100. He runs a home over 4 floors. I run my home over 2 (2 up 2 down). He only lights his log burning fire only when temperatures are very cold (like the last 2 weeks). I have been lighting my log burning fire every night since mid October. The only difference is that he has his GFCH on constant tick over at all times. I only have mine switched on for 1.5hrs in the morning and 2hrs in the evening and have only switched it on in the last 2 weeks with the temperature drop (thinking it would be cheaper). Last week I was at home, owing to snow and the fire was lit by 2pm.
My question is, is it actually cheaper to have the GFCH on constant or to only have it on for rapid spurts (as I do now)?
(I have been fighting with my provider for the last 4 years and refuse to have the heating on, unkess absolutely necessary)
Or am I just with one of the most expensive providers?
I am with E.On.

Any thoughts welcome..... thank you

[Count-A-Strong]

The insulation values of your Walls floors and roof may be less than your neighbours. Is his house newer than yours?

[Jbird]

Mine was bulit in1861 - his in 1891

[Count-A-Strong]

Well, we can discount that as a factor then UNLESS he has cavity wall insulation, double ( or triple) glazing, loft insulation; and you don't.

[Pea Pod]

You would need to know his price per unit. I was paying 6.5p for gas my neighbour 3p and we are both with British Gas.