I have bought 2 properties this year with covenants. They are very common. My 60s bungalow came with a few which originate from the independent builder now long since gone. I am aware of the covenants but I am told by my solicitor that these would be very difficult to uphold now. If the local council had taken on upholding them then it would be different.
The covenants include, no caravan parking, no high fences, no high washing (ignored by one neighbour)., keep the front gardens unfenced. Nothing out of the ordinary, though more in number that you would expect.
I think in my case it is more gentlemens (or womens) agreement. I wonder how many actually do complain about these covenants. I'll test it this year when I fence off a small area of side land. This may prompt complaints by neighbours and I shall see.
My other house, older and which you'd presume would come with more covenants, actually has only one.
This one I wont be testing. I am not allowed to boil tripe!!