That is a fabulous compilation.
With only a little bit of tweaking (e.g. the inclusion of the b-sides to 'One Inch Rock' and 'Pewter Suitor', and 'Oh Baby' - and its b-side - put on the first disc), those first 26 or 27 or so tracks are EXACTLY what Marc's record company should be putting out as a single CD!
You'd need literally thousands of pounds to get a complete original vinyl run of all those 45s.....the early ones go for a fortune, 3 of the Tyrannosaurus Rex 45s came in promo sleeves, and John's Children's 'Midsummer Night's Scene' was only dished out at gigs in Leatherhead (apparently), and is one of the rarest, and most valuable, 45s ever made in the UK.
Get onto it (or should that be Get It On) Marc's record company!!!!