Will last until 12 April or until 40,000 PDF certificates have been issued.

From the GRO website:

Applications for each PDF cost £8, must be made online and include a GRO index reference.

England and Wales records which are available as PDF's in pilot 3 include:
Births: 1935-2006
Deaths: 1958-2006
Marriages: 1837-2010

Full details can be found on the website https://www.gro.gov.uk/gro/content/certificates/

Now, where's that 'shopping list' I made.

Pam