undercover police bike ?

this bike as a long tube sticking up in the air on its rack at the back. it reminds me of one of those kids training bikes with a handle on the back. or a dodgem car. perhaps bikes are powered by overhead electricity lines in these modern days.
or maybe it’s an undercover police bike and the tube conceals the various aerials and communication paraphanalia [no ‘e’s for me].
DSC01336.jpg

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