In reply to Guy Hurst:
Assuming its a straight 1-1/8 steerer? Normal quick release QR on your front wheel? will the front hub convert to thru axle? What travel are the Toras? Stanchion diameter?
All these things will affect what options you can replace with, especially on 26" and standard QR, as both these are getting rare new, so 2nd hand may be only viable option.
As always, the risk with 2nd hand is that you'll end up servicing anyway for £60 - £100.
Assuming you want 120mm to 140mm ish, Rockshox Reba; or air or coil versions of RS Revelations, are good performing forks for the money (£150 to £200 2nd hand?, not checked for a while). Or if less travel required, try and find a pair of RS dual air SIDS.