The good old Co-op allows limousines though:
"We've put measures in place to meet social distancing rules whilst using our vehicles. This is to protect you, your family and our colleagues as much as possible. Our cars have been adapted and fitted with screens separating the driver and passenger areas.
We advise that passengers do not travel if:
they or someone they live with have experienced coronavirus symptoms within the last 10 days (including a high temperature, new and continuous cough or loss or change to sense of smell or taste)
they or someone they live with have recently tested positive for coronavirus
they or someone they live with are awaiting test results
they've been asked to self-isolate for any other reason (e.g. traced as being in close contact with someone who’s been diagnosed with the virus)
Our colleagues will be maintaining social distancing with passengers.
The number of passengers allowed to travel in a limousine is limited to a maximum of 4 if they’re from the same household (including support bubbles).
Passengers from different households will not be able to share a limousine, unless they are in a support bubble.
All passengers must wear a face covering, which fully covers the nose and mouth, when travelling in the vehicle. Passengers must provide their own face covering"
https://www.coop.co.uk/funeralcare/coronavirus