No; just a few. Lydd, Shoreham, and a few others.
The UK requirement for mandatory ATC will ensure they continue to mean very little, because nearly all airfields with ATC already have conventional approaches, and you can fly those with any GPS, whereas to fly a proper RNAV/GPS approach you need a GPS installation specifically certified for flying GPS approaches and you need a flight manual supplement stating that.
It's a dreadful waste... but it is unlikely to change because nobody wants to pay for the ATC salaries, and nobody wants to pay for the ATCO desks which would be needed, one way or another, to control the approach traffic to a non-towered airfield.