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BT Group (BT)

Mundio Mobile Limited Vectone (Mobile)

Telefónica Europe O2 (UK)

FMS Solutions Ltd FMS Solutions (Ltd)

COLT Mobile Telecommunications Limited

Internet Computer Bureau Limited

Vodafone Vodafone (UK)

BT OnePhone (UK) Ltd BT (OnePhone)

Tismi BV

Telefónica Europe O2 (UK)

Telefónica Europe O2 (UK)

Network Rail Infrastructure Ltd (Railtrack)

Network Rail Infrastructure Ltd (Railtrack)

Hay Systems Ltd Hay Systems (Ltd)

Vodafone Vodafone (UK)

TalkTalk Communications Limited Talk (Talk)

FleXtel Limited

Cloud9 (Cloud9)

Teleware plc Private Mobile Networks (PMN)

Hutchison 3G UK Ltd (3)

LogicStar Ltd

Telesign Mobile Limited

Icron Network Limited

Stour Marine Limited (Greenfone)

Truphone (Truphone)

Lycamobile UK Limited (Lycamobile)

Teleena UK Limited

Marathon Telecom Limited

(aq) Limited (aql)

EE T-Mobile (UK)

EE T-Mobile (UK)

EE T-Mobile (UK)

EE (Orange)

EE (Orange)

JSC Ingenium (UK) Limited

Sure Isle of Man Ltd. Sure (Mobile)

Synectiv Ltd

Virgin Media Virgin (Mobile)

Gamma Telecom Holdings Ltd.

UK Broadband Limited (Relish)

Shyam Telecom UK Ltd

Limitless Mobile Ltd

The Carphone Warehouse Limited iD (Mobile)

CESG

Sky UK Limited

Limitless Mobile Ltd

AMSUK Ltd.

Home Office

Hanhaa Limited Hanhaa (Mobile)

Bluewave Communications Ltd

BT Group (BT)

Airwave Solutions Ltd (Airwave)

EE

EE

EE

UK Broadband Limited (Relish)

University of Strathclyde

University of Strathclyde

University of Strathclyde

BT Group (BT)

Telet Research (N.I.) Limited

Vodafone United Kingdom Vodafone (UK)

Vodafone United Kingdom Vodafone (UK)

Hutchison 3G UK Ltd

Network Rail Infrastructure Limited