As the title really. My dad has taken his block paving up and came across this (pics attached) only a couple of inches lower than the blocks. The bit with the red cap on feels loose but not sure it is and the tube is just kinked and taped. He had his meter moved about 15 years ago so we're assuming it was done then but not sure. Any ideas what it is and if its safe. I'm sure it should be lower for a start