To be honest, that those prices, it's probably almost cheaper to use electricity.
I would certainly be using an immersion heater in summer for my hot water, and looking into cheap rate electricity / economy 7.
That might not be such a bad idea now. It hasn't really been an option up to now as i had to consider the possibilty of having no heating in the event of a power cut as my elderly mother was disabled, but she passed away recently and i am the sole inhabitant here now and i can manage a few hours without heating.
A gas central heating system needs electricity too.

I did an experiment one summer. Stopped using the gas boiler and used an immersion on a timeswitch for hot water. Drop in gas cost was about the same as the rise in electricity cost. Very little in it, except that on gas we were also heating a towel rail in each bathroom. So, with gas you get free warm towels in the morning. :-/
If that's the case on mains gas I should think the calculation would come down very much in favour of leccy for you, and that's before considering the possibility of using economy 7 overnight to heat the tank (assuming you have one).
Ripping out the central heating and getting storage heaters is probably a bit of an extreme move but it might be worth bearing in mind that, if you don't use all rooms 24/7, heating those you do use with leccy and turning down the CH would be a wise move.
If the opportunity of mains gas is there it's probably worth going for, though. I guess it'll probably increase the value of the property in addition to making it more attractive to potential buyers and making it less costly to heat.
Kevin