Thanks CtL, found them now
The air-con evaporator drains are accessed from behind the carpet at the gearbox tunnel. You will have to remove the foot rest on the driver side by removing the bolt cover and 8mm bolt, the footrest then slides upwards to disengage it from its fixing
Then just pull the carpet down a few inches to gain access to the drain tubes
The passenger side is even easier as there is no footrest. Access is however hampered slightly with some wiring so rather than risk snagging a cable I refitted the drain tube with a jubilee clip as access with the Clic-R clamp pliers was rather limited
The tubes were clear but I now have piece of mind
Just my sunroof drains to check now