freelancing with others under one name

Hi everyone, I'm new to this.

I'm wondering if anyone can give me advice, I don't seem to get very far with speaking to the inland revenue so I thought I'd ask real people.
My situation is difficult to explain but I'm sure it's not complicated in reality. I'm wanting to form a sort of collective with two other people so that we can all bring in potential business and share the workload. I don't want to do this on a permanent basis, just maybe every now and then when I'm strapped for cash, because I would like to possibly do it in the evenings and weekends if I get a full time job. We want to be able to invoice clients under a joint name and to share the payment how we choose. I don't want this to be a fully fledged company and don't want to deal with being liable for anything. It's purely a way of working for potentially big clients on one off projects as a group of freelancers essentially. Is this at all possible? I hope I've made sense. Any advice would be much appreciated.

Cheers.