Rather than risking ordering a part off ebay, and it being either wrong, or in poor condition, I popped into my local Honda dealer yesterday, to enquire about the part. No, they couldn't give me the part number, but they would be happy to order a part for collection the next day, paid for in advance...
£68.61 + VAT lighter in the wallet later, I picked up the part the next day. (And got a thumbs up out the car window from a honda salesman who was driving the same colour of Jazz as I had, but two years newer as I was driving into the dealers!
)
Anyway, here is the part number from the door seal as new from Honda 72315-TK6-A01
Carefully removed the old door seal. it easily peeled out, without removing any inner door trip or surrounds. Never saw any clips etc on the old seal, so perhaps it had been replaced previously? Luckily no signs or rust etc on the metal body work!
Starting at the top left corner I gently popped the new seal into place, working my way around the door opening clockwise. Gently does it, being careful not to get outer edge of the seal (which you can see inside the car) trapped behind any plastic trim:
The key seems to be to get the top left corner piece fitted first, then work your way around. At times the seal looked like it was too big for the opening, but by gently smoothing it into place with the palm of my hand it eventually fitted into place:
Pretty straight forward job!
The new seal is a bit "powdery" in places, I suspect that is just because it is new, it also looks a bit grey compared to the existing (5 year old) seals on the car. Probably due the existing seals on the car having been "polished" during the valet before I collected the car last week.
Is there any product I can apply to help keep the new seal (and the originals) in good condition?
Only other thing I could do with tidying up in the car is new rubbers for the brake & clutch pedal.
But at least that is the door seal replaced, even if it was quite pricey!