UK: England and Wales: a valid notice?

The ICLR, as part of its (free) WLR Daily Service, has provided a summary of the recent Court of Appeal decision Hilmi & Associates Ltd v 20 Pembridge Villas Freehold Ltd [2010] EWCA Civ 314: see here. The summary's headnote reads:

Where, before the coming into force of the Companies Act 2006, a corporate tenant served notice, pursuant to s 13 of the Leasehold Reform, Housing and Urban Development Act 1993, seeking to exercise a statutory right to acquire the applicable freehold, it was required, for the notice to be valid, to affix its corporate seal, or to supply the signature of two directors or a director and the company secretary".