The wednesday night duathlon series is run by Scunthorpe Triathlon Club, abd John who runs it has a very liberal, inclusive policy towards competitors. You are very welcome to come and have a bash and test yourself out.
The duathlons are run on alternate wednesday evenings from 7pm, be there with plenty of time to spare to get signed on. Next race is 2nd May. You MUST wear a helmet during the bike phase. Cost: £2.00 per race. Just turn up and sign on.
Best of luck