Lings have quoted, £175 plus delviery for the manual. ouch.
American store want $72.95 + $150 delviery. again ouch.
However after hours and hours of searching, i've found this for free, on the internet, with a search facility. Boatinfo - Honda Service Manual for BF35A, BF40A, BF45A and BF50A
Excellent. Maybe of use for others too as it lists various outboards.
Granted its a little slow, but when your saving a huge sum of money and its got a search bar, makes it a little easier.