Sit in it in the pi@@ing rain and watch Alex. You'll see if it is leaking.
I had drips onto the pedals- not all the time. A weep round one corner, mostly the left side, most of the time when it rained, also from the top, rarely and from the seams in the 'A' pillar lining - rarely.
I read up on sunroof leaks and decided all possibilities were red herrings.
If you cannot see water coming in, cover the screen with polythene and see if the water stops coming in. Bit of gaffer tape sealing the poly across the roof will stop most of the water getting in (not for driving in of course).
Good luck with it Alex.