According to Companies House Website / the API it’s due on: 7 May 2021.
According to https://ewf.companieshouse.gov.uk/ and the e-filings reminders service it’s due on: 4 June 2021.
We’ve experienced similar issues with a number of clients and can’t work out a). which is correct and b). if the second date is correct - how to access it - so that we can inform our clients of the correct date to file.
We think there may still be an issue with the data in this instance, so I will need to speak to technical colleagues and get back to you as soon as I can next week.