Mark,here are tracks i personally have never heard,whether that makes them rare,i don't know,i have a lot of cd comps,and the following i've never come across before:

Dave Christie-Love and the Brass Band
The Pop Workshop-Fairyland
Bullring-Birmingham Brass Band
Julian Starr-My Jewel Went Away
Buggy-Harry The Keeper
The Annie Rocket Band-A Little Smile On Christmas Morning
Joyces Angels-Flowers For My Friends
Jason Paul-Shine A Little Light On My Room
Neil Holland-Shepherd Boy
Sgt Smiley Raggs-Smoke Smoke
The Decision-Constable Jones
Smiley-Penelope
Bill Nile and the Good Time Band-Bric a Brac Man
The Laurels-Threepence A Tune

As i say,i don't know if they're rare,but i did have a look at many off my uk comps of 60s and early 70s pop,sike,psych etc,including The Piccadilly Sunshine 20 volumes,which this type off sound was omnipresent on those.

I don't have all the cornflake Zoo comps,and some other comps,that have been out over the years,but those listed,i've never heard or come across,though i've heard off Joyces Angels,i've never heard their music.

Maybe others who take part here,may have more information if those i've listed being on some compilation or other....i may have missed them......it's 5 am,and i'm a bit bleery eyed,but i did go through my cd comps of UK stuff,it took a while,and a matter of fact,it has resulted in me keeping out a fair few comps i've not listened to in an age,that i shall be spinning over the coming days!!!!