CAllum - dont write off the UK winter for lessons - there can be some ideal weather, still and calm conditions with excellent visibility are ideal for first lessons.
Even in the summer you may lose 50% of bookings to weather cancelations of youre unlucky. It would be good policy to book once a week - that'll probably get you 2-3 lessons a month. You need to keep going at that rate or you will slip back between lessons and you'll end up taking much longer in terms of hours flown (and total cost).