the middle one is a mordex merlin it was made by mordex of sheffield and was the working mans version of the allcock aerial.
mordex was a sheffield company (toolmakers/engineers) who made near copy's of other reels designs there are a few different ones such as the mordex major, mordex mentor,
I picked up two last month for £20 on ebay
Trudex was made by JW Young as it says on the badge and was made in the 1960s, they are probaly the most common vintage reel today there are literally hundreds on ebay each day, you can pay in the region of £100 for a mint one in a box, normal price check ebay and see what they go for I have 4 of them but were bought some time ago.
The leeds reel is a single bearing reel manufactured and aimed at the discount market and has been popular for a long time many centrepin anglers cut their teeth on one of these, I still have my leeds reel but never gets used these days. price to buy brand new around £40 but shop around you will get it cheaper
see thread on mordex
Centrepin, Trotting, River fishing instruction.