Lauren if it starts with a 2 then its some form of green. 298 is olive drab, so memory not so bad after all :-D
Matt I went to that place a few years ago & found them quite unhelpful when I tried to get a match for the Shorland. Maybe they are ok if you can provide the BSC. In the absence of this they wanted the model of car & year. Despite explaining the unusual nature of the vehicle once they found that Shorland 1966 was not listed they weren't willing to make a match from the sample that I took.
Now the radiater place further up on the corner by the main road I have found most obliging & used them several times.