I was pointing out flaws and hopefully adding constructive criticism which IMHO will help them think outside the box and come up with a better solution. I appreciate the the person is only at GCSE stage, but it is at this point that they need input which helps them learn and better prepares them for life on the outside.
Good idea however most caravans have a awning light anyway. Also many caravan sites have lights so no need even for a normal torch. On many camp sites wildlife i.e. rabbits etc running past at night will trigger the light which could then annoy people. It needs a setting to limit the distance and the size of the object being detected. BTW if it is hanging up outside the unit, what is going to stop someone walking off with it? It may find a niche market.
How can they make the check any longer as all they do is open the passport, check for the relevant stamps, scan the dog for the microchip to make sure it is the same dog and you are on your way! Another scare story I think probably started by a Remainer and then passed onto you?
On another forum someone did use their microwave off a bank of 110ah batteries. You need to use a very big inverter due to the start up wattage of most microwaves. Also drains battery very quick. I think he gave up eventually even though he had several solar panels for recharging. Better to use a small generator.