After some considerable time searching this week I finally added both SG2 and SG9 to the collection.  I had been looking for a mint copy of the early Britannia SG2 for a while and it was proving hard to source, whereas SG9, I thought I already had in the collection but realised recently that there was a gap where a stamp was supposed to be.  Now remedied these two are worthy entrants in the collection, both being decent four margin examples of these stamps.