I remember listening to Desert Island Discs some time back in the mid 90s, and the guest of the week (a female author whose name I forget) picked the Elgar Cello Concerto. She explained that she had been working somewhere, and heard it being played, upon investigating, it was Du Pre rehearsing. I once read that Mstislav Rostropovich refused to play it because he didn't think he could better that performance.
The Tallis Fantasia. Invariably put the hairs up on the back of my neck. If you get the chance to hear in Gloucester Cathedral, then take it, it sounds so much better. When it was premièred (it was a commission for the event), it was a filler on the programme, the main event (so to speak) was supposed to be the Dream of Gerontious. The music critic from the Times recognised it as being some special, and is said to have described it as so very new and so very old. Ivor Gurney and Herbert Howells (also locals) were in the audience, and supposedly spent the entire night walking the streets of Gloucester discussing it. Do that write tunes like that any more ?
Adrian