Notification of Major Interest in Shares

04 July 2011

AVATION PLC

(the "Company")

Notification of Major Interest in Shares

The Company received notification on 1st July 2011 that, as at 30 June 2011, Slater Investments Ltd hold 4.01% (1,550,000 shares) of the direct voting rights in the Company.

ENQUIRES:

Avation PLC

Jeff Chatfield, Chairman +44 7783 942 553

W H IRELAND

Harry Ansell, Stockbroker +44 20 7220 1670

James Joyce +44 20 7220 1666

Financial Public Relations

Bishopsgate Communications +44 207 562 3350Laura Stevens/Giang Nguyen

Websiteswww.avation.net