"Could anyone let me know what the minimum hours / landings would be to keep the licence in date and if there are any variations if i want to carry passengers."
Well the minimum hours is one hour every two years conducted as a test with an examiner. That will give you 3 take offs and landings so you will be current to carry passengers for 90 days. Thereafter you just have to maintain your 90 day currency if you wish to carry passengers.