You do not need permission to sublet. You do however need to give notice to Caledonian Roofdwellers & to De Montfort Court Management (Leicester) Ltd on each occasion on which you do sublet & you must obtain agreement in the following form from your tenant. You also must pay a £10 fee to each company on each occasion on which you sublet.
To
Caledonian Roofdwellers Ltd
De Montfort Court Management (Leicester) Ltd
Flat 3
De Montfort Court
Stoneygate Road
LEICESTER
LE2 2AB
Dear Sirs
FLAT
In accordance with my lease I hereby notify the above companies that I have let the flat to [insert full name of tenant] (the subtenant). A cheque for £10 to each company is enclosed.
The subtenant, by signing this letter, covenants directly with the Lessors and the Management Company to observe and perform throughout the term of the letting the covenants on the part of the Tenant contained in the lease including the covenant to give notice in respect of assignment, subletting or parting with possession.