Please note: Sadly, if your policy term began on or after the 5th of January 2021, you will not be insured to drive other cars on your Marshmallow policy. Please check your policy documents for a confirmation of this.
You can check if you are insured to drive someone else's car by reading your Certificate of Motor Insurance or checking your 'Policy details' inside the Customer Account.
You are insured to driver other cars if your Certificate says under 'Insured Persons':
"The policy holder may also drive a vehicle with the permission of the owner of a motor car not owned by the policy holder and not hired to him/her under a hire purchase agreement."
If your Certificate does not contain this phrase, you are not insured to drive other cars.
Please note: If you are insured to drive other cars, your cover is only Third-Party (Damage to another person's property & injury to another person or any passenger(s) you are carrying).