Ok ,
Step 1 done - front mats removed, two and a bit pints of fluid removed from the backing foam, and mats drying alongside the boiler. MDF kick panel also drying out, as the bottom third of that was wet (pity, as Ian commented when fitting the solar roof that it was rare to see a pristine one...
)
Step 2 I'm not clear on - the threads mentioned the "orange thingys" - where are they, how do you access them, etc?. I've had a look thru' the two threads I've found (this one and the linked forum on drainage), but can't see them, so not sure if I'm looking under the bonnet or the front floor space - all guidance very welcome, as ever.