Usual two faint vertical folds prevent a higher grading. A lovely note !  

Issuing Bank :               Bank of England

Denomination :                        £5                       Date of Issue :   9th August 1952

Prefix & Serial No. :          Y55 078711               Signatory :          P.S. Beale, Chief Cashier

Condition :                               EF+                     Yearbook No. :   BE 94c