I have registered a Company Name with Companies House.
I want to also register it as a trademark.
Can I add the colour, font of the Company Name etc afterwards without having to pay twice?
Registering a trademark holds it’s own cost over and above registering a company name.
This page should answer all the questions you may have: https://www.gov.uk/intellectual-property/trade-marks
If it doesn’t come back and we can follow up.
You can check with the helpdesk at European Enterprise Network