Can you do that with a Dahon or do you pull that ungainly fold with one hand and a basket/trolley with the other. Hopefully you may be one of the very few with a third hand to pick the stuff off the shelf!
No, I leave the seatpost extended and use it to push the Dahon along. It stays put when I let go, so I can use the pushing hand to pick stuff off the shelf and put in the basket. Because a Dahon keeps the rubber side down even when folded, it's not wobbling about on tiny little rack-mounted wheels like some folding bikes I've seen.
I feel your pain at having to do imperial centuries near home.
Not a case of "having to" but it seemed to make sense to do the local ones first and I've yet to do Breckland or Peterborough loops from Lynn. So far: Norwich (once on hybrid, once on Dutchie), North Norfolk coast, Ely (aborted at 97 miles following a crash at 70) and Holland.
Funnily enough I feel no pain doing a 1000km or more on a Brommie. Is it me, or is it the design? Its unbeatable as hand luggage which does saves on hiring.
I feel no pain on the Dahon so far but I've never done that distance. I don't have a particular objection to hiring, rather than having to carry and store a bike all trip for a couple of days riding.
Why are you not choosing your Dahon?
The Dutchie is sooooooo comfortable, the Falcon's quite fun and fast, while the Dahon has enough custom parts that I'm less confident in my ability to fix it and complete the ride. That matters less when travelling for work (its usual task) because I can take it on buses or put it in a taxi - slower and less convenient than riding it, but a good fallback.
Aha but you can use a Brommie as an excellent wheeled trolley with the shopping basket perfectly placed?
From now on, I shall refer to Bromptons as shopping trollies!