Replying to Bowlandclimber's request here are photos of the damage to the car (see my last post - A day of good and bad bits - River Sprint 3).
At first glance the damage looks minimal, but the whole of the panel outlined in red dots, and the silver one underneath have to be replaced and painted plus a new number plate, but even so the cost seems excessive. Fortunately it will be met by the third party's insurance.
Although I have had the car for two and a half years I never knew that the circular disc in the photo houses a spray which comes out automatically when the windscreen washers are operated and sprays the headlamps.
A new key for the Yeti with automatic operation would cost £140, but I can have a manual one for £67. The Skoda dealer has to send off for the key and wait about two weeks, then they have to have the car and "code" the key.