CAA have announced extensions to  competency checks, medicals, SMS and certificates. From their press release dated 26 March the following relief applies:

If you have upcoming currency requirements, flight reviews, proficiency checks, or training and checking requirements, an exemption will be issued extending the period within which these checks and reviews must be completed by a period of three months. 

If your medical certificate is due to expire shortly, this will be extended automatically by a period of 90 days, through the issue of an emergency directive under Section 27G of the Civil Aviation Act 1990. You will still have to comply with any surveillance conditions associated with your medical certificate during this extension period.

If you have an organisational certificate expiring soon (this includes certificates issued under Parts 102, 109, 115, 119, 129, 139, 140, 141, 145, 146, 147, 148, 149, 171, 172, 173, 174 and 175) the CAA will initiate a process to issue a new certificate for a period of six months from the date of expiry of your current certificate, subject to it being able to assure itself that there are no significant safety concerns in doing so. This will be completed through a desktop risk assessment reviewing all intelligence and information held by the CAA, and by a review of your exposition. There will be no charges associated with this assessment and the issuing of the new certificate. You do not need to make application for this process to be initiated.

If you have an upcoming Safety Management System implementation date, and have not yet been certificated, an exemption to Part 100 until 1 February 2022 will be issued. This will exempt your organisation from the need to have a Safety Management System until an implementation date determined by CAA. This implementation date will be before 1 February 2022, and well beyond your current agreed implementation date. If you would like to retain your current implementation date you are welcome to do so, just let us [CAA] know.

The CAA Exemption and Emergency Directive along with  FAQ’s can be seen here