very wet passenger footwell

RAIN HAS MADE MY PASSENGER FOOTWELL VERY WET PLEASE HELP LEAK FROM SOMEWHERE

Check bulkhead drain holes are clear and sny grommet s in the bulkhead including can leak through the sound deadening , also corner of the windscreen , door cards/ plastic sheet intact , sunroof drain holes . Rear light seals 

Door drain holes at the bottom of the doors. Tin top or cabby?
If cabby porous roof skin, foam gaskets gone. J hooks adjusting etc

Mk1Jim could have its most likely leak. Very common if scuttle panel not cleaned out o water could be getting in via cabling run through bulkhead then check  the doors.  
My previous mk 1 had a bad hole aT the rEAr arch that soaked the whole footwell when driving in wet  

also the seal around heater box can perish