Grant of Options

Tristel PLC 23 December 2005 Tristel PLC ('Tristel' or the 'Company') 23 December 2005 Grant of Options Tristel, the AIM listed provider of infection control products, announces that it has granted options to employees over 660,000 ordinary shares of 1p each ('Shares'), under the Company's EMI Option Scheme. The options have an exercise price of 53.75p and vest 25% from today and then in 3 equal tranches on 23 December over the following three years. The options, once vested, can be exercised by 23 December 2015. In addition Paul Swinney, Chief Executive Officer, has been granted options over 250,000 Shares under the Unapproved Option Scheme. The options have an exercise price of 59.5p, vesting 25% from today and then in 3 equal tranches on 23 December over the following three years. The options, once vested, must be exercised by 23 December 2015. Paul Swinney does not have any other options and is currently interested in 2,713,986 Shares, being 11.39% of the Company's issued share capital. For further details please contact: Teather & Greenwood Limited Robert Naylor / Harry Nicholas Tel: 020 7426 9000 This information is provided by RNS The company news service from the London Stock Exchange ZZFGGKZM