Frequently getting 403 Forbidden error codes while trying to access the UK Companies House website from Azure AVDs

We are unable to access the Companies house information, to find information on a service, the URL Find and update company information - GOV.UK (company-information.service.gov.uk)https://beta.companieshouse.gov.uk/” for all of our users who access from a ring fenced set of IPs. This is really impacting our business, we are getting a 403 Forbidden message for all of our users, can you please advise what needs to be done to allow the service from the above IP addresses for our company KPMG LLP, it looks as though you are blocking it as a supposed DDOS however this is legitimate and business use.