Can we ask for proof of caring responsibilities and if so what would be reasonable proof?

The ICO is providing new guidance to organisations regarding data protection and coronavirus, which can be accessed here: https://ico.org.uk/for-organisations/data-protection-and-coronavirus/

Information about the Covid-19 health status of individuals is special category data under the GDPR. This means it is high risk which has implications for how you use it, store it and keep it secure.

You will already hold health data about your employees as this is necessary to provide a safe, accessible place to work and to make reasonable adjustments to the workplace. You now need to make sure that the information you gather about your employees, visitors to your sites, customers and suppliers about Covid-19 is processed in accordance with data protection laws.

Commercial partner Damien Charlton explains the basic principles of force majeure, and how they are relevant in the current extreme circumstances caused by the Covid-19 pandemic.

On 7 May the Government published guidance on how contracting parties can act responsibly in order to assist the effort to deal with Covid-19. The guidance seeks to persuade contracting parties to act reasonably and recognise the impact of Covid-19 on contractual counterparties. This will continue to be relevant as business begins to emerge from lockdown.

Conduct risk assessments! Your RA must cover every foreseeable risk arising from a return to the workplace, including the impact of reduced staff levels and any operational/administrative changes necessary to ensure social distancing.

Appropriate steps should be taken to manage and mitigate identified risks. Where this is not possible, businesses need to decide whether certain activities are necessary for the business to operate or if they can be temporarily put on hold.
Keep a close eye on the comprehensive Government guidance: https://www.gov.uk/guidance/working-safely-during-coronavirus-covid-19

In particular focus on social distancing and workplace health measures. This guidance will evolve over time and you will need to be sure that your organisation is sticking to it AND reviewing and updating its risk assessment.

The vast majority of disputes settle without ever reaching a final hearing with something in the region of 2-5% of all cases actually ending up in court at a final trial.  So whilst it is very unlikely you would need to attend a court hearing, it is always a possibility.