Auction Houses
These are auction houses who seem to consistently auction varieties and other material of interest to the Silver Jubilee philatelist.

David Loffstadt
David Loffstadt usually has a good selection of Silver Jubilee items included in his auctions.
Philatelic Gems of the British Empire
P.O. Box 107
Bromley, United Kingdom BR2 8ZA
Phone: +44 (0) 20 8462 7185        Fax: +44 (0) 20 8462 7387

Empire Stamp Auctions
Steve Drewett is very knowledgeable about the Silver Jubilee stamp issues. His auctions usually contain a few items.
Thornton Lodge, Stanshall Lane
Felton, North Somerset, United Kingdom BS40 9UG
Phone: +44 (0) 1275 474 766      Fax: + 44 (0) 1275 475 214

Philatelic Friends
Ken Joseph has a special section of his philatelic auction devoted to Silver Jubilee items. Because they are based in South Africa, the strength of the stamps are biased to British Africa. Good site. Note that the items are now priced in sterling.  
P.O. Box 26456
Hout Bay
Cape 7872, South Africa
Phone: +27 21 790 5943         Fax: +27 21 790 5745
web site:

Temple Bar
Steve Ellis of Bridger & Kay regularly includes items of interest to the Silver Jubilee Collector in his auctions. The offerings are usually very good.
Temple Bar Auctions
P.O. Box 1600
Bristol, BS40 5BD United Kingdom
Phone: +44 (0) 1934 863 656        Fax: +44 (0) 1934 863 652
web site:

Universal Philatelic Auctions
This auction house has included a number of Silver Jubilee items in its last few auctions. Catalogues include a listing of prices realized from the previous auction as well as items not sold.
P.O. Box 5678
Argyle, Scotland G84 9WE, United Kingdom
Phone: +44 (0) 1436 670 301       Fax: +44 (0) 1436 670294