We occasionally get enquires from owners, looking for previous owners of their Mirror dinghy, or their family. It's probably a long shot, but you never know.
The UK Mirror Class Association no longer keeps records of who owns and who had owned a Mirror dinghy (as we did up until about 1990).
Early Yearbooks had a list of owners who were members of the Mirror Class Association. We have copies of the 1965, 1967 and 1969 Yearbooks, so have some information for some boats (not all) up to sail number 15500. It's possible there is also a list in the 1970 Handbook, but we don't have a copy of that one. There is no list in the 1971 Handbook (no doubt because it was becoming a nightmare to typeset thousands of address - all done by hand).
Sadly we don't have much content prior to about 2000, and what we do have is mainly open meetings, Mirror championships and boats for sale. You can do a simple search for the sail number in what we do have online using the search menu item in the red banner at the top of the site. , so it's quite possible for a Mirror to be sailing or racing at a club without it cropping up on our site. We have a large number of newsletters, yearbooks & other publications from the 60s, 70s, 80s, 90s, which has yet to be scanned and digitized into a searchable format (an example of one 1973 newsletter here). It's quite possible there are references to your Mirror in these, depending on how active the owner was back then.
You can also try Googling "Mirror dinghy <sailnumber>", but again, if she's just be cruised, rather than raced, her number probably won't show up.
Another tack is to try and track down who you purchased her from, or looking for history locally to where the boat is sailed. Boat don't tend to move huge distances when they are sold, so it's possible the previous owner(s) were local.
Another option, if you do Facebook, is to try posting on one, or both of the Facebook Mirror groups popular in the UK, asking if anyone knows of the boat. It's a bit of a long shot, but again, you never know.
If you e-mail Martin Egan with the boat details and your contact details, we can create a 'boat article' for her, including that you are searching for her prevous owners or their family and your contact details. It's not much, but if anyone searches for her on Google etc., they should now at least get that article as a hit (it will take Google a few days to index it). The list is also displayed on this website (see below). Needless to say, I can add photos and history to the article if you want.
Here is the current list of boats which have owners looking for ex-owners or their family.