newer cherokee 140's (even though the 150 hp engine was installed) have the trim on the floor and the newer throttle system.
so it is entirely possible the inside of the cockpit of a warrior and a cherokee 140 will be virtually identical.
for most people the warrior is a little nicer and has another pair of windows aft.
The 140's I flew were built in the 70's and were really pretty nice...back in the 70's.
England seems to have its share of remarkably old airplanes. So, look around!