After my e39's gearbox and head gasket decided to die in tandem, I picked up a Corsa C 1.7DTI to hack around in - mainly because it was local,cheap, has a full Vauxhall history and fresh MOT - , so far I actually quite like the thing - never thought I'd say that about a Corsa! - it goes surprisingly well for what it is and is very frugal,especially after a long line of six pot BMW's! - just the job. 
Alas, after the weekends heavy rain though the O/S rear footwell is now full of water, I've googled water leaks in Corsas and the servo seal is a common culprit but my front footwell's are bone dry.
It's a 5 door so I'm wondering if the door seal has failed, it looks fine and I can't see any water coming in when I get somebody to spray water at it whilst I'm inside.
Any suggestions?

Alas, after the weekends heavy rain though the O/S rear footwell is now full of water, I've googled water leaks in Corsas and the servo seal is a common culprit but my front footwell's are bone dry.
It's a 5 door so I'm wondering if the door seal has failed, it looks fine and I can't see any water coming in when I get somebody to spray water at it whilst I'm inside.
Any suggestions?