wrote:
P.S....

The metal shed and metal framed greenhouse are both on a patio which in
turn is sat on sharp sand followed by 100 mm mot1 hardcore.

The nearest bit of earth to hammer an earth rod into is the lawn and this
rod would be at risk of lawnmower or strimmer damage.

Surround it with something like a bit of pipe/tubing.

Only alternative is to drill right through patio, sharp sand and hardcore
and use an extra long earth rod...

Decent drills and long enough bits can be hired.

Not a lot of point in asking for advice if you are concerned about the
difficulties of implementing it and are looking for excuses why you cant.


GH