Her Majesty The Queen, 2010 TCC 108 — Prerequisites for valid notice of objection. (blg.com)
Should a tenant's notice seeking collective enfranchisement pursuant to the Leasehold Reform, Housing and Urban Development Act 1993 (LRHUDA 1993), s 13 prove invalid, the tenants will not be precluded thereby from serving a second, valid notice without delay. (newlawjournal.co.uk)
«It is open to any of the joint tenants to serve a valid notice to terminate the tenancy but before doing so they should seek professional legal advice on the implications.» (law.stackexchange.com)