I'm after a new lock knife, criteria are as follows:
Must be a high quality, last a life time knife.
Single blade no longer than approx 3.5"
I'm looking to spend a max of about £50
Non serated.
Any suggestions welcome, the brands i have considered so far are buck and spyderco...
Kershaw is normally my "go-to" brand for recommending sub-$100 knives. For the UK folks, most of Kershaw's offerings are off-limits due to the assisted opening... but their "flipper" non-SpeedSafe knives are also great.
You can try a Kershaw Skyline... which is a very high-quality knife, that's the lightest folder I've ever handled, but sports a very usable spear-point blade in Sanvik 13C26 steel and a G10 handle. For ~$35 on the US market, it's a steal, especially since it's made in the USA.
My other suggestion for a budget knife would be the Spyderco Tenacious. This one is much beefier than the Skyline, with a thicker blade, and stainless-steel liners that reinforce the G10 handle... but weights about 2X as much. The 8Cr13MoV steel is the Chinese equivalent of AUS8 and takes a mean edge.
Both knives are very adequate. The Skyline is an easier EDC because it's lighter, slimmer, and narrower... but the flipper may still annoy a policeman. The Tenacious appears to be much stronger, and the thumbhole-opening is very sheepie-friendly. Again, it's about $35 in the U.S.
I personally own a Skyline... but having handled the Tenacious just last weekend, I have no problems recommending it.
With regards to Kershaw JYD or Cyclone... I can tell you that I've handled the former, and owned the latter... and I wasn't thrilled. JYD seemed a little awkward in my hands, and the Cyclone is both VERY BIG and VERY SLIPPERY. With a shaving-sharp factory edge, I felt uncomfortable opening and closing the Cyclone, because I thought I was going to slip off the anodized aluminium handle and cut myself.