He showed in the RA summer exhibition in 1978 & 1980, on one of these occasions I think he had a very large picture similar to those I posted. (abcrit.org)
In among this debate comes the annual Summer Exhibition, the most incredible expression of diverse creativity imaginable. (royalacademy.org.uk)
I showed a different version at the RA Summer Exhibition in 2008. (royalacademy.org.uk)