Just complete the non EASA one. The CAA never updated the declaration form after issue of the exemption to permit use of EASA aircraft.
You can simply rely on the exemption until 8th April 2020 when we all hope it will be renewed.
The exemption can be used with either U.K. or EASA licences
The exemption is here.
https://publicapps.caa.co.uk/docs/33/1283..pdf