"140mm fork but would they be all right on a 456?"
The clue is in the name ..

456 is suitable for 4", 5" or 6" forks (so 100-150mm)

It's very difficult for me to objectively discuss the two frames really, so perhaps I shouldn't?

The 456 is a killer buy at £125, no doubt.

The Blue Pig is my evolution of thinking on hardtails, from the last year and a bit of riding quite technical trails, which started with the Summer Season project, and evolved through the implications of the CEN frame tests which are a new standard to aim for (and exceed).

The Blue Pig was designed, largely to ride up hills really well, with a nice forward position, keeping the front end pinned, and a nice pedalling position, and to hammer down hills with a nice stability from a slacker head angle and a sensible BB height.

Bimbling along the flat wasn't really taken into account so if you do that, then perhaps it's not the bike for you.

Thanks for considering 2 of my designs.

cant comment on the 456 as i've never ridden one, but i think the blue pig is ace, one of the main reasons i bought mine was the uphill advantages, i was sick of the front end wandering on my old bike, it hasn't happened yet with the pig. Worth an extra £135?

i thought so