Understandably, the landlord needs an empty premises to re-let, free of any claims to occupy from the former tenant, under-tenant
or third party who has been allowed to occupy them in the past.
You can search on intellectual figures from Bede to Adam Smith to John Maynard Keynes or political figures from Boudicca to Margaret Thatcher, but humbler figures like Herbert the jerkin maker, an eleventh century Cheshire under-tenant
, will also produce results.
Whether or not this route is viable will depend upon the financial standing of the would-be under-tenant and the amount of work required to convert or improve the office space.
Whether or not the under-tenant pays the original tenant, the original tenant still has to pay the rent due under its lease to the landlord.