This site isn’t marked on the OS map. Burl has it as 617646, but I’ve found his co-ordinates to be off when looking for other sites. Curiously there are ‘Stones’ marked on the ‘Explorer’ map at 630646- are these one and the same? Once the FMD restrictions are lifted a site visit should sort this out, plus the good description from MacLeans “Standing Stones of the Lothians”. Burl has this classified as an embanked circle, whilst MacLean notes that the interior is slightly depressed.