I had for some time been paying just over £70 a month for electricity.

Wanting to cut my outgoings, I did a comparison, and found a company offering about £55 a month

I liked the look of that, so went through the process of changing to this other company.

Shortly after, I got a phone call from my original supplier, asking why I left.

I told them I had found somewhere cheaper.

He then asked if I would consider returning to them if he found a better tarriff

`Yes` said I.

After some keyboard tapping, he said he had a tarriff based on my past usage which was fixed until March 2018

at a cost of £34 a month.

Seems that for me, the way forward was not to threaten to leave and go elsewhere, but to actually do it.

Might not work for all suppliers though.