Re: That farmer...
"Never underestimate the bandwidth of a motorcycle courier with a DAT tape"
An MoD site's system was being upgraded. Its data exchange link with other site was nested layers of different protocols. Apparently the upgrade budgets for each site rarely happened at the same time - so legacy handling had to be built in.
The most ancient layer turned out to be 5 track Telex encoding - and the customer also wanted the new system to be capable of reading/writing physical 5 track Telex tape. When asked why this was needed - the answer was: "A dispatch rider might be dying of radiation poisoning - but the tape in his backpack will still be readable"