British Gas

British Gas has rolled out a tariff offering customers eight hours of free electricity over weekends if they have one of the company's smart meters installed in their home. But while it will cut costs for existing customers, it's still considerably more expensive than the cheapest energy deals available on the market.

If you're switching between many of the big energy providers you'll now benefit from 10 'commitments' guaranteeing a smooth and hassle-free transition – but if suppliers fail to deliver, you may still need to get the Ombudsman involved.

A company called The Big Deal has partnered with The Sun newspaper to run a collective energy switch, and the Great British Collective switch is also offering cheap tariffs on a regional basis. But how do the deals stack up on price and customer service – and how do they compare with MSE's own Big Switch Event 4?

British Gas and EDF have become the last of the big six energy firms to announce a price drop this year, cutting the price of gas next month by 5.1% and 5% respectively. But even after the cuts their standard tariffs will cost £100s more than the market's cheapest, so check now to see if you can switch and save.

Customer complaints about energy firms increased by a quarter last year, according to the Energy Ombudsman. But whether you've had cause to complain about your provider or not, you can save £100s by switching now.

Co-operative Energy has blamed ongoing problems with its new IT system as the reason why it was the most complained about energy provider in the third quarter of the year.