The August 2024 revision of Standards Document 11 (Procedures & conduct for all GA Theoretical Knowledge Examinations) has amended the list of equipment which candidates may use during an examination by removing an 'Electronic Flight Computer' from the list of permitted equipment.
See https://www.caa.co.uk/publication/download/12697 .
See https://www.caa.co.uk/publication/download/12697 .