Here are some HR, and HR related contacts that you might find useful:
ACAS - The Advisory, Conciliation and Arbitration Service; advice for employees and employers in England, Scotland and Wales. Find advice on employment law, HR processes and good practice at work: https://www.acas.org.uk/advice
HSE - The Health and Safety Executive is the UK government agency responsible for the encouragement, regulation and enforcement of workplace health, safety and welfare, and for research into occupational risks in Great Britain: https://www.hse.gov.uk/index.htm
Leave Dates - Highly recommended; Leave Dates is an online staff leave planner, giving visibility of team holidays and absence; Leave Dates is free for small teams. In our opinion, it is an essential tool to enable employers manage holidays and other statutory absences: https://www.leavedates.com/