craig, I’m in the US but here is what I have for UK support.

U.K QuickBooks Customer Care:
Tel no : 0808 168 9535
Hours of operation: 8:00 a.m. to 8:00 p.m. (GMT), weekdays (including bank holidays)
Weblink to check on FAQ :  http://support.intuit.co.uk/quickbooks/

Resolution for 'bank holidays issue: 'How do you change payroll to be just an employee as no longer a director? The director check box is greyed out so cannot change this.' available: Yes.

The bank holidays issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the bank holidays issue yourself by looking for a resolution described in the article. If it is a complex bank holidays issue or you are unable to solve the issue, you may contact us by clicking here or by using other bank holidays support options.

For more information about resolving issues related to bank holidays in Quickbooks/QBO or to get support for the issue 'How do you change payroll to be just an employee as no longer a director? The director check box is greyed out so cannot change this.', click the link below: