It's not a coincidence that the people who take full responsibility for their energybills, report having little if any problems. The more involved you get, the less trouble you can be caused.

I wouldn't say always best to go dual fuel but more often than not it is. When you do your comparisson look up electricity only, gas only and then dual fuel. See what's best for you.

I'd also agree with the previous posters. Internet propositions may sound tempting with very nice savings. But as has said before these savings last only as long as the prices remains as they are.. soon as they change that saving has pretty much flown out of the window. If is far far better to pay a lesser increase with a capped/fixed product now than a greater increase on a variable priced product later.