Thanks Norman, less road chatter sounds good.
I think the Pashley's drum breaks and hub dynamo suit well. If only the Guvnor came with the hub dynamo too! It would save me the expense of having a front wheel built. I was more thinking about protecting my trousers from rain, and the underside of the brooks saddle. But yes, the less road grit and winter salt on moving parts the better I'm sure.
On the off chance you've experienced both the Guvnor and the Roadster (28"), how would you say the ride compared? Can you feel a difference with the Reynolds 531? I realise your Guvnor is now converted, but perhaps you took it for an outing before the work was done?
If the difference was enough to justify the expense, I'd consider buying a Guvnor for the frame, and fitting the extras I need.