L White - the process is easy but you need to demonstrate how it's no longer required. That wouldn't be simply saying the company has been dissolved for example.
Your solicitor(s) need to check the legislation re dissolved companies and what happens re such interests (assets) etc and then decide what action is required and what type of application is then suitable.
Once they have submitted their application they then need to request expedition to keep the wait time before it is processed to as short a period as possible (generally under 2 weeks). Everything then relies on the supporting evidence provided