Extension of 28 day rule to 56 days very interesting: I hadn't heard. Would be good if, indeed, extended into 2021 or beyond. [ Especially for folk constrained by overage clauses on their land relating to tourism use requiring planning permission. ]
Being a critic of Cornwall's dependency (without much control) on tourism, I really would not wish to (wouldn't) add to the main-season hordes, but a bit of out-of-season flexibility over 56 days could be really quite useful. Food for thought, thanks honeyend, should the 56 day rule be extended beyond 2020!