Eastern National SD2790, AVX958B, Bristol FLF / ECW H38/32F, in all-over advert for Typhoo Tea. New in December 1963, withdrawn September 1980.
2790 (or to be completely accurate 1667 pre-1964 renumbering) was delivered in December 1963 as 729WWC but had to be re-registered because it was not licensed until January 1 1964 and by then the year letter system had been introduced in Essex (it started in Essex in early December 1963).

Photo taken by Eric Thompson, Saturday 14 July 1973