API down on Monday 10 Feb 2020?

I’m getting the following error:

ConnectionError: HTTPSConnectionPool(host=‘api.companieshouse.gov.uk’, port=443): Max retries exceeded with url: /company/03909886 (Caused by NewConnectionError(’<urllib3.connection.VerifiedHTTPSConnection object at 0x1178405c0>: Failed to establish a new connection: [Errno 50] Network is down’,))

Also, I’ve found that I’ve been blocked once or twice despite not exceeding the rate limit? I’m trying to match a couple of thousand businesses that I have in a database, so the API seems the most logical approach, and am using a 0.7 second time delay between requests. Should I increase this? Are there any other rules about fair use that I should abide by?