For information. Letter (part) received from Freehold Managers January 2013
Subject: Re: Retrospective Letting Notice of Registration ----
"....... write regarding the Lessor's Notice of Registration for subletting on the above Lease which our records show is due for renewal.
As you are aware, as the leaseholder of the above property you are required to notify the Lessor with a Notice of Registration should you sublet the property to a third party.
.........registration fee of £120......"
In my case, sublet details passed in 2009 and according to my lease, no requirement to re-register now or an an annual basis, no change of tenant.
A challenge might very well be in order. I will await further correspondence.