Exciting topic I know!! 
I'm considering purchasing a flat in a low rise purpose built block (built in the 70s I think). My one major concern is there is no gas in the property and no possibility of installing a new system as there is no gas allowed to the block. Would this be a deal breaker for you?
The estate agent has implied that the vendor would accept an offer quite a bit under the asking price and my budget so I would have funds to change the existing night storage heaters for something new and more efficient but I have no experience of electric systems. Anybody got any advice to offer!?