I share people's enthusiasm for Bate. The Dutton Bate and Bell Viola Concertos CD was marvellous. A pity there is only Bell's South African Symphony on Marco Polo to go along with his Rosa Mystica Viola Concerto.
The Dutton Bate and Chisholm CD is even better in my opinion and the Fourth Symphony is equal to the Third, albeit less immediately appealing. The 2nd and 3rd Piano Concertos are attractive, the Cello Concerto perhaps less so.
I would love to hear the Violin Concertos. If I recall correctly the Third Concerto was composed for Yehudi Menuhin and Dutton were considering recording it several years ago. There was a Dutch radio broadcast of the first or second Concerto in the 1950s I think.
The cellist who recorded the Cello Concerto used a Kickstarter appeal to raise the funds and himself prepared the score. Perhaps this is what is needed to bring recordings of the Violin Concertos to pass. I have read the scores do exist for them.
Totally agree with your second paragraph. The Bate/Chisholm CD on Dutton is my favourite Dutton release (Arnell's 3rd and 5th symphonies and Steinberg's 4th Symphony rate very highly as well.)