I'm trying to access the Met Office's DataHub API via the following:

https://data.hub.api.metoffice.gov.uk/sitespecific/v0/point/hourly?latitude=52&longitude=-1

I have supplied the API Key, but I always seem to get a 403 error with "Resource Forbidden"

I have subscribed to the Atmospheric using the Site Specific option.

Anyone got any ideas?