So I did a double test this morning.
Engaged the hand brake and rev'd my engine, The bite point was around 2K rpm before I heard the creaking of the hand brake going. I didn't notice the slipping in first gear. so as far as I'm aware, first gear seems ok but as described below, there just isn't any power.
Also removed the MAF cable and didn't notice any improvement.
Whilst driving this morning I noticed a few more things
-1st gear just has less power in it. I can accelerate but I have to rev much harder - around 4500 to 5000 to get what I used to get at 2500 to 3000
-2nd gear slips mildly at around 4000.
-3rd gear slips from 3500 to 3000. my car also used to handle change into 3rd gear at around 2700 but now when I change at that rpm, the car seems weak.
-4th gear slips again but performs slightly better than 3rd gear in terms of power.
-5th gear - haven't tried it yet
-Reverse seems unaffected. I put my foot down when I was in reverse and I was still getting the same "oomph"
Many thanks for your conitnued help.