I've discovered that on my Mk3 (same coil as AR) the HT lead screws into the ignition coil in the same way as the plug cap screws in. All other coils i've seen have the lead fixed in place. Just wanted to add to the information pool

hopefully when i re-assemble with a new bit of lead i will have sparks

i've managed to take the HT lead out my coil & cut a bit off where the HT lead wire was snapped , theres two layers of plastic insulation the outer has to be stripped as the hole in the coil is smaller than the over all width of the HT lead , not sure how long it will last but it runs and thats ok for now as i didn't want to spend too much on parts to find problems else where .
Mk2 coil with HT lead
Part number 30510-KAE-000
has been superceded by
Part number 30510-MK4-405
Part No
30510MK4405
30510-MK4-405
Price
£68.00
(£81.60 inc vat EU)
Approx
€ 88.04 | $ 98.47

Well if the mk3 & AR do share the same it's a good job you can screw a new HT lead in
Part No
30510KAE771
30510-KAE-771
Stock Discontinued