Gas inspection cover on Drive way?

[CANDYPANDY]

Can anyone help ,
There is a small metal plate on my drive approx 4"x4" inscribed with the words Peart and Gas. I am planning to relay the driveway and would like to know if I can concrete over this or must it remain. I have contacted National Grid but they are very slow in getting back to me with any information . This appears to be my last resort to resolve this issue
Many thanks

 

[45yearsagasman]

It may be an old syphon cover among other things but thats a guess and the only way to be sure is Transco identifying it for sure.May be you should report a smell of gas,that usually focuses their mind!