Is anyone good at legal parking things?

[Sausagefingers9]

Basically, we would like to pave over our front garden and make it a bigger drive for our cars. We at the end of a cul de sac and one of the houses over the road from us owns the pathway that would lead up to our drive (if that makes sense?)
If we got our drive and she decided to park her car at the end of her land it would obstruct us from using our drive.

So who would be in the right? We don’t want to start a feud with her but parking is a problem here and having the extra drive space would be really useful.

I can try a better diagram later but munch has the right idea.
I did wonder about parking sideways but I’m not sure how much space you need for that as it looks like a faff.

The path and cut through fence was there when we moved in. There wasn’t always a cut through the fence, we feel it’s unsafe driving out but the council don’t seem to care.

Check your deeds, do you have a right to access your drive by car, or even on foot. Quite common on new estates and there's covenants in place forbidding the drives to be blocked

The photo seems to differ from your drawing as the photo appears to show the path as not only going along the side of your house but also it appears to be a perpendicular path that forms a T shape. I have indicated in blue where the path appears to go. So you have to drive over both portions of the T to get to your current driveway (shown in yellow)? How are allowed to do this currently? Is there a covenant or something that allows you to currently cross the path with your car?

You can't access across your neighbour's land without their consent. You'd be crazy to extend your drive if the only way on/off it is to trespass on your neighbour's land.

^This

Your drawing seems to not include the path (blue) that runs perpendicular (T shape) to the other portion of the path running along side your house. Your drawing has the 'road' running all the way to the fence at the end where the photo shows a sectioned off portion in front of the fence. That's what I am struggling to get my head around.

The pink arrows show the path that doesn't appear in your drawing.