Hello. I used compass and direct measurements on the 25 inch to the mile OS maps of 1872 for Overchurch and Arrowe Park and the 6 inch to the mile OS maps at Bidston. We have true circles not ellipses or 'eggs'. If you don't accept this get the maps and check yourself. As for scale the inner circle at Arrowe Park has a diameter of ~2300 ft...and yes I am quite aware this exceeds Avebury having studied that site closely. On alignments they all seem to be there : summer solstice sunrise, winter solstice sunrise, equinoxes, etc. Major and minor standstill moonrise points of the 18.6 year nodal cycle, equinox moonrises and settings...and reciprocals to sun and moon set. If all this is too much to swallow look at the evidence: see my book 'The Overchurch Mystery'.

Professor D P Gregg (retired)