AIM Rule 26 & Adviser Name

Tristel PLC 21 August 2007 Tristel PLC (the 'Company') AIM Rule 26 compliant website and change of adviser name The Company today announces that the information required by Rule 26 of the AIM Rules for Companies (February 2007) is available within the 'Corporate' section of the Company's website at www.tristel.com. The Company today also announces that, following its change of name from Teather & Greenwood Limited to Landsbanki Securities (UK) Limited with effect from 9 August 2007, the name of the Company's nominated adviser and broker has changed to Landsbanki Securities (UK) Limited. Enquiries: Contacts: Tristel plc Parkgreen Communications Ltd Paul Swinney Paul McManus Chief Executive Tel: 020 7479 7933 Tel: 01638 721 500 Mob: 07980 541 893 Email: paul.mcmanus@parkgreenmedia.com Landsbanki Securities (UK) Limited Nomad & Broker Sindre Ottesen/Simon Brown Tel: 020 7426 9000 This information is provided by RNS The company news service from the London Stock Exchange