When using a trading style you must always be transparent about the real company identity using the trading style. It should not be used to mislead so all official paperwork and communication should include a simple way for the recipient to identify the underlying registered company.
Using a trading style allows you to operate in multiple business areas without having a separate company for each one. This is considerably more efficient both administratively and from a cost saving point of view. Operating all transactions through one company is much simpler than try to manage several separate companies.
If your trading style is available as a company name for registration at Companies House it is worth considering registering the name as a limited company and keeping this additional company dormant. This will prevent someone else registering the trading name as a limited company and using it themselves. You should not trade through the dormant company unless you are sure you want to run to separate legal entities. A dormant company is registered in the same way as any other limited company but will file dormant accounts each year. You can register the company using our system and we can assist with Dormant Accounts Filing each year.
We provide more information on dormant companies here – dormant company guide