Eight more 66s! Later: Thanks to all who have since provided correct train identities. I have not amended today's sightings but have concluded that on this site it is the loco. identities that people want so that is all I shall report in future.
66587, 4M68 north at 1637
66954, 4??? south at 1653
66171, 6O42 south at 1713
66099, 6X48 to Didcot yard at 1736
66165, 0X01(?) south at 1756
66144, 4L40 east at 1814
66096, 4O30 south at 1832
66501, 4M99 north at 1838