Yes we do – where possible we don't exclude any tariffs, nor do we do what some comparison sites do and have a default setting where you only see those that pay us.

When we say whole of market, it means every available open tariff. However, there are occasions when we might not have all tariffs on the market, such as when a small, new supplier comes on the market and doesn't send us their rates straight away. Or very complex, innovative tariffs, such as Octopus Agile, where the rates change on a half-hourly basis depending on the wholesale price. These kinds of tariffs aren't yet included on any comparison sites due to their complexity.

There are also 'collective switches' available sometimes, and we can't include those (except our own). A collective switch is where a trusted intermediary, such as a council or other organisation, asks energy firms to bid to provide a tariff for it.

Sometimes these can offer deals better than the market's cheapest, but regulator Ofgem's rules means you have to register for these schemes before the tariffs become available (you're not obligated to take the tariffs once you've registered).

So it is possible, on occasion, for an 'exclusive' elsewhere to undercut the winner of our open market comparison – yet if you are considering one, do make sure you compare it.