Thanks to those who kindly answered as do realise this topic has come up several times before.

The Irish sites look quite fascinating with Tiompan mentioning the rock art at Reyfad, Killadeas and Innerleithan as well (hope to be going back there next year so genuinely will make notes).

Midmar Kirk looks waiting be visited. Thanks to everyone who posted links - I have looked at them all and have been inspired to "get back out there".

Am struck again (perhaps it was what the archaeologist I spoke to was referring to) there is very little in England, that continues to be visible anyway.