Erratic throttle response when cold

[HPsauce]

Well, I've done quite a few short journeys today and all was going well, even at places that "often" show symptoms. The car was really quite "sprightly".

Then I did the short journey that is almost guaranteed to give problems and.....

Originally Posted by steamship

It was almost as if you were driving with the handbrake on.

To explain, I leave my house (which is on a corner of a side road so there's a bit of reversing and wiggling initially) and drive "down" my road to its end, some 350 yards downhill in a 30mph area steep enough to require minimal throttle or braking until stopping at the end where it joins a main road.
I then stop and turn right (mostly) onto a single-carriageway "A" road (still 30mph) and very often get these symptoms. It's slightly uphill and a fairly busy road so you need "reasonable" throttle, though this evening the road was empty so I didn't rush.
I drove about 200 yards with the engine revving around 3000rpm at under 30mph (and at least one gear change) before I got bored and "blipped" (released and repressed) the throttle at which point it reverted to sensible behaviour, pulling well around 1500/2000rpm.

Subsequent journeys this evening have been through very similar junctions (it's a hilly area) without problems.