Neighbours enormous caravan parked on the road (not drive) for months

It's a minimum 6 week process, not allowing for any administrative delay, or delay in getting the caravan recovered or processed for crushing. So, sure.

The OP says it's enormous -- might its size be an issue, due to access or obstruction issues? Even if the local council does allow caravans (normal size) to park on the road.
I'd take a few photos to illustrate the problem and email them to the council. It might be fine, it might not.

Would an emergency vehicle be able to get past it?

There have been by-laws prohibiting it in the last few places I’ve lived. One particular caravan was a massive pain and basically prevented anything wider than a fiat getting up the street. The owner apparently went on holiday just as the council slapped an enforcement notice on its window… there was much chuckling when they angrily posted about their caravan having been stolen a few weeks later. Council had crushed it.

They won't be able to pin any damage to the caravan to you if you didn't do it. Maybe the fact it has been damaged will encourage them to put it onto the driveway?

Probably even harden for them to reverse on with the caravan there

Our council don’t allow it, and a neighbour was told to move theirs off the road after someone complained about it.

At least they're desirable to someone, I suppose.

OP it was your husband who dinged the caravan, wasn't it?

It's also not wise for security purposes, as caravans can be very desirable to thieves. If it's already there on the road, they've done half of the criminal's 'job' for them.

It seems variable from area to area, but I too always understood that it was only legal to park a caravan on the road whilst it's hitched to a (road-legal) vehicle.

Lots of people use caravans for extra storage, so if you can do that and leave it long-term on the road on its own, why can't you just erect a shed on the road outside your house and be done with it?! Especially considering you have to get special permission for a skip on the road - even a small one - and then it's only for a limited time.

Whatever the legalities, it's an extremely antisocial thing to do. Most average touring caravans (let alone big ones) are very sizeable and cause a huge obstruction when parked in a residential street. You could legally leave an articulated lorry parked in a residential street (assuming it's taxed and insured), but it would soon make it unbearable and very dangerous if left there constantly. By all means make your delivery or take a day or two to fill it up with all your stuff ready for your house move, but once the job is done, it needs to go back to the depot/storage yard.

Some new build developments have it written into title deeds that caravans, trailers, boats etc are not permitted unless for loading and unloading etc. it would be in your title deeds if so.

In many areas there are bylaws forbidding this. Check with your local council

Or on the OP's drive.

The OP can move her own car off it, when she knows her mum is coming.

It's really inconsiderate of them. Have you mentioned it to them? It becomes tricky now, because if you point out it is hard to reverse out, it could look like you are to blame for the dent.

I'm not sure council do much, there are a few caravans dotted round our town, not usually in front of houses though, people must live in them as they have generators.

Only if the vehicle requires tax. Not all do. I have a classic car (41 years old) which is tax exempt as it is classed as an historic vehicle. It can still be parked and driven in the exact same way as any other vehicle.

If a caravan doesn't require tax in the first place, it doesn't need to be taxed to park it on the road.

wtf. They will pin it on you. Tell them to leave you in peace and mind their own business

Because in many areas it's prohibited, usually due to access issues ie they take up more width on the road than a 'regular' vehicle and this can cause issues; but also because people could be using them as dwellings.

I'd say the issue there is that the caravan on the opposite side of the road, together with Mum parking outside OP house leaves no room for cars etc. to navigate up or down.

Anyway, I thought it was wrong/illegal/bad etiquette to park opposite another car if it causes a blockage like that.

If the neighbours come round and accuse you of denting their caravan, the obvious answer is something like "what makes you think that? Do you think the way you have parked it makes it difficult to for us to access our drive? Isn't that illegal?"

Have you read the OP's updates, or are you being deliberately obtuse? The "what did they say when" turn of phrase is one of the most irritating things on MN. Dripping with smug superiority.

Cant your mother park across your drive or is there not room

Regardless of whether the council will get it moved or not, you have every right to be pissed off about it! It would make me grind my teeth every time I saw it and mutter obscenities.