From a British vehicle spares viewpoint the only two traders of note (to me) were Marcus Glenn (previously absent for 5 years) and Carl Jenkins (LMS). Marcus Glenn was very busy with sack truck loads of items departing his large stall regularly. Plenty of his excellent paint leaving too, particularly towards the end of the day. LMS's range of lines were as we usually see.
It seems that the British vehicle world (including motorcycles, my 'thing') has waned at Stoneleigh, perhaps that's something we ought to work on. Mind you, the stalls in the two show halls were fully taken, even Lieutenant Hubert Gruber was there!