Nice venue but there are plenty of downsides. The ...

Nice venue but there are plenty of downsides. The majority of the staff are rude and unpleasant.
THERE IS NO AIR CONDITIONING!!! In a room full of sweaty moshers everyone was dripping wet.
There's only one toilet right at the back of the venue so trying to struggle there and back through hundreds of people during a gig is a nightmare.

There is a cloakroom which if you have the O2 Priorities app you can use for free once a week however none of the other offers are accepted as this is an "O2 Forum" not an "O2 Academy" (even though they have posters around saying to use the app for drinks offers).

Sound quality wasnt great either and in the middle right up front there are no speakers so everything sounds muffled and good luck hearing the lead singer talking.