bd01uk
Um,
This is only my second time in writing on here:
Posts: 4 
Anyway, your question...
Rules:
CAA/JAA: you can fly solo as long as your CofT/CofE are valid (incl. medical) - which they are, based on the dates you said.
CAA/JAA: you can take passengers provided you have made at least three takeoff and landings in the preceding 90 days - to do so at night requires one of these three to have been done at night (plus night qualification/rating or IR obviously)
Group/club: will probably require check-ride more regularly. You mentioned Cabair, so we'll use their example. Cabair require you to do a "dual check" every 6 months to hire their SEPs. (every 3 months to hire their MEPs) - since it's been > 6 months since your last Cabair check-ride, to hire their aircraft you will need to do a dual check.
It's also worth mentioning that Cabair require you to do a circuit detail and PFL with an instructor if you've not flown
anything in the previous 28 days.
Other schools/clubs/groups have their own systems - but I doubt they're too different...
Okay so far?
Add to all that a damn good helping of
common sense, and you will see that > 7 months without flying you really need a check-ride...
Have fun