alias

I started out topping up diesel for the winter as that seemed to be received wisdom at the time. I got a water build-up problem that I think was due to a leaky deck fitting about ten years ago, and pumped several litres of dirty water then cloudy diesel out with an oil extractor pump. After that I checked for water every six months and got diminishing amounts for the first couple of years and then nothing. When added biodiesel came in I stopped topping up in the autumn due to concerns about the potential for it to decompose over time and make bug growth more likely. In the several years since then I haven't found any further water in my six monthly checks, or in the water trap, so while tank condensation might be an issue I have not seen appreciable water ingress because of it.

Isn't having a licence proof enough that you had one (at the date of licencing). Our marina asks for proof of insurance but not BSS. Edited to add: My last certificate arrived as an email attachment, have you checked the depths of your email account?