I am reading Life by Keith Richards. It is great. I am up to 1963 and Keef is describing the tour. The Stones played Chester in 1964 and 1965 (at the ABC) so maybe that is what he is remembering here:
Sometimes chief constables would devise these ridiculous plans. I remember once in Chester, after a show that had ended in a riot, following the chief constable of Chester police over the rooftops of Chester city as in some weird Walt Disney film, with the rest of the band behind me, and him in full uniform, with a constable at his side. And then he loses his fucking way, and we're perched on the top of Chester city, while his great "Escape from Colditz" plan disintegrates. Then it starts to rain. It was like something out of Mary Poppins.