I had friends as a room leaders not yet qualified but working towards NVQ3 so it is possible. I would only say that at least one of the members needs to be NVQ3 in the playroom. That person does not need to be the supervisor, You can be one, sometimes my old nursery would change the rules if we had staff problems and they would say that someone next door is qualified, and that is enough.
and one more thing... why the manager is not qualified? how he/she got the job? is it the owner? as far I as know manager needs to be qualified, that's why my workplace now has such a staff problems, and when I leave in about a month time the ASCC will be shut, because there is nobody qualified to take over the manager position!