Later tour ad (Folk Roots, Nov 1997, pub 21st Oct, pg78) says 'with special guest Peter Blegvad'; Note at bottom of ad states, '..... Mary Coughlan had to withdraw from this tour.
Apart from different keyboards and musicians on each version, this cd seems to be very '72/ 73/'74 centric, apart from 'Pigeon and 'Pilot - oh and Tiny Dancer. Big clue though is early b- side times about 3.34 mins and GYBRd version at 4.00 ish; as shown in cover scan here.