If you'd like to add business use to your policy, it's best for you to do it yourself online through your My account.
It's simple enough - just:
You can add business use, see how it will affect your premium and make any extra payments. If your policy hasn't started yet, you'll need to set the 'effective date of change' to be the same as your start date.
An administration charge of £12 (plus Insurance Premium Tax at the appropriate rate where applicable) may apply when changes are made to your policy either yourself via My account or by our customer service team.