I should not think so, baz. The reduction in the number of vehicles has decreased their risk so I would not think they'd be too troubled.
As an aside, have a good look round before renewing. Every year my insurance at renewal increases considerably (this year, with Churchill, it was 28%). I nearly always change insurer these days as loyalty does not pay at all. Most years one or other of the companies is offering a deal for new business (which willl obviously be withdrawn at renewal). By searching round this year I achieved a 5% reduction rather than a 28% increase,