Thomas Pink has now launched its fleet of London taxis and heritage buses.
If you spot one, take a photo and upload it to your Facebook page to enter the Thomas Pink competition.
The fan with the most sightings who has posted them on their page will win a £1,000 Thomas Pink voucher! Competition ends 15th July.
Once you have posted the photo of the Thomas Pink taxi or bus on your Facebook page, take a screen grab and email it to firstname.lastname@example.org