Update on my situation:
It wasn't definite if the fault was with the clutch or gearbox, so I chose to get both replaced to make sure.
On 14/01/2009, I purchased an Exedy OE clutch kit for £140 from a UK based retailer.
On 17/01/2009, I took my car to a gearbox specialist 25-30 miles from home to get the gearbox replaced and my new clutch fitted at the same time. When I booked my car in, I was told they had an Accord Type-R gearbox (U2Q7) ready on the shelf and my car would be ready on Monday PM if I dropped it off on Saturday. On the Wednesday 21/01/2009 I discovered that they didn't have the gearbox. After loads of empty promises to call me back and being fobbed off, I lost faith in them and collected my car on the Friday 23/01/2009 and saw that they had not even touched my car. A whole week wasted.
Whilst driving home, my clutch pedal was behaving strangely, sometimes it was very heavy. This backs up the general consensus that the clutch is at fault rather than the gearbox. Because of this, I have decided to not bother replacing the gearbox.
When I got home on 23/01/2009, I ordered a Fidanza Flywheel off of Gripforce-Clutches on eBay for £156 which was scheduled to be delivered last Thursday (29/01/2009). UPS are being knob heads so the flywheel has been delayed. Rescheduled for delivery today, but because of the recent snow fall, the UK has ground to a halt, so I'm not holding my breath for it to be delivered today. I'm typing this at home as I'm unable to get to work because the county has ground to a halt as it always does following snow!
Last week after checking the clutch kit part numbers, I discovered that the clutch I was sent is designed for the 4th gen Prelude so last Friday (30/01/2009), I ordered a proper 5th gen Exedy OE clutch kit for £195. A couple of days after ordering the 5th gen Exedy OE clutch kit, I discovered that the 4th gen and 5th gen clutches are interchangeable! So, I'll be having a spare clutch for sale once my car is sorted.
So the current status is that I'm waiting for the Fidanza flywheel and 5th gen Exedy OE clutch kit. When I have both, I shall book my car in at my usual Independent Honda specialist garage to get the parts fitted.