Hi CreakyKnees,
I bought a front towing cover made by Specialised Accessories, cost was £69 from Towequip. The cover is fully lined with a soft downy material which does not scratch the windows etc. The cover does miss out a bit of the caravan approximately 6 inches square on both sides. this is due to the the bulging front of the caravan front. I have spoken to the manufacturers, who are happy to make me two modified lower side pieces to my measurements. Overall I am totally happy with my cover, as it stops the stones, mud and diesel soot getting onto the caravan. It takes approximately 10 minutes to fit, if there are two of you and you need the caravan step to reach the top strap each side. Like someone above said, it does cover the front marker lights, if you do not intend to tow in the dark, I see no problem, it has bright white reflector patches sewn in. If covering the marker lights is illegal, then I think the cover manufacturers would have fitted see through panels. You can get the cover in a choice of colours, even black, so people will think you are towing a Stealth.(anyone seen one yet?????) I have no regrets getting mine, and it does create a talking point at the water/waste points!!!!