Clutch issues

Help!!
Got a K reg with 120k on the clock.
Was awkward to get into gear, while it was in the garage for other stuff, they changed the slave cylinder. Massive improvement or so i thaught!
Here is the issue. From cold, wont go into gear. Have to start in 1st, then once its warmed up, used a bit, its fine, even goes into reverse without force.
Drove down the motorway for a while, exit at junction, strugled to get out of gear, then it wouldnt go in, had to turn off to engage gear. A few changes later its fine again.

Any ideas please

sounds like your master cylinder has self bled it's self
if it don't happen again you'll be fine, if it does PANIC!

Dont wanna sound daft, but i am new to this self repair lark! can you elobrate a bit.
Thanks

Oi! nuff of that.

Not self-repair, self-bled.

When you change the slave they have to be bled fully before they'll work properly and sometimes it's a bitch to do right ... however, if you're lucky it can force the air out itself after a week or two of driving and changing gear .. sometimes working properly, sometimes not, giving very similar symptoms to yours. It should settle down, so put up with it for a bit longer, say another week of driving, not a week of sitting on the driveway, and see what happens!

Many thanks, will hang fire and see what happens