Open question: how does one small investors together combine, in order to fall back to unit trust fund?

on most investment platforms to receive to capital admission you need a minimum overall sum of £1000. As you can do, do you it, so that you can combine 10 people together, in order to invest £100 of everyone. and you form it certified with them all, which have same possession. Those is not simply 9 people, those the money 10 person gives there and it invested £1000 in the name it all.