This doesn't seem to be being discussed here much... If the shit truly hits the fan, I'm going to assume that fuel supplies will be low, and what there is will be panic bought, or reserved for things like emergency service vehicles and public transport. Unlike tins of tomatoes, it's not easy to store petrol safely.
I remember the 2000 fuel crisis - it didn't take long for things to go south news.bbc.co.uk/1/hi/uk/924574.stm
With that in mind, I'll be having my already well used bike serviced again in March and buying some spares of consumables (inner tubes, brake pads etc). I've already got a good set of panniers (Ortlieb) which I can easily get a weekly shop into, but I'm considering getting a trailer for larger items - this sort of thing www.<a class="break-all" href="https://amazon.co.uk/dp/B078VZV9FP/ref=cm_sw_r_cp_apa_.iD8BbV5AATCF?tag=mumsnet&ascsubtag=mnforum-preppers-3427603-Transport-related-prepping" rel="nofollow" target="blank">amazon.co.uk/dp/B078VZV9FP/ref=cm_sw_r_cp_apa.iD8BbV5AATCF
I don't have young DC, but if I did I'd be looking at getting a cargo bike for transporting them to school and much larger quantities of shopping - like this www.christianiabikes.com/
I'm lucky in that I'm not really reliant on my car, but what plans are other people making for petrol shortages and transport?