In normal circumstances of unexpected financial hardship we’d look to sell it. Even in a recession we’d expect to be able to do this, albeit for a lower value. As it stands the housing market is at a standstill. So we can not access that money yet can not access UC. So have two mortgages to pay, plus bills and zero income and zero rent.
Playing devils advocate though did you make money off it pre virus? If not why not sell it before? Does it have a mortgage? My dad who no longer lives here still has a flat, he rents it out for holidays/weekends. Most of the money "made" just covers the running of it, the rest goes into a rainy day fund.