Great Britain Stamps - Official Stamps

Another collecting area for me (and why I only choose impossible areas I do not know) is the Official stamps of Great Britain. It was due to these fascinating overprints that I became interested in the other overprints which, of course resulted in my obsession with the China overprints. What is remarkeable (and incredibly irritating sometimes as disappointments are common) is how often these stamps were forged. The GB Officials are not only some of the most rare and expensive of the British stamps, they are also surprisingly difficult to acquire, even the lower valued ones. The following are scans of the stamps that I have managed to obtain so far. (If you know where I can obtain some of the missing numbers, excluding the horrendously expensive ones of course, please let me know! Enjoy!