I have always want to catch bleak, I don't know why, but it's not the type of fish we get up in Scotland, where would one head to get in amongst a decent shoal!
I don't know anything about bleak. But I know what you mean about wanting to catch a specific fish. I Fly-Fish for trout, rainbows mainly, but I have always wanted to catch a Grayling but I don't know why either.
Good luck catching one .
Have a look at this mate its a piece on graylng fishing around wor end of the country ! http://www.chroniclelive.co.uk/sport/other-sport/angling/winter-grayling-fishing-north-rises-1376159 The river blyth is worth a look at too - http://www.babaa.org.uk/
cheers andrew
The Thames my man, the Thames