THOMSON FINANCIAL SIGNS WITH BT FOR RADIANZ ULTRA ACCESS

New York - 20 June 2007

Ultra High Speed, Low Latency Service Delivers Sub One Millisecond Round Trip Transaction Speed

Thomson Financial, an operating unit of The Thomson Corporation (TSX: TOC, NYSE: TOC) and a leading provider of information, news and technology solutions to the worldwide financial community, today announced an agreement with BT to provide Radianz Ultra Access, a new high speed service as part of the low latency Thomson Data Feed (TDF). BT currently provides network services that give Thomson Financial clients, giving them access to exchanges available in low latency, as well as Thomson Financial’s universe of real-time data through a single connection point. With the addition of Radianz Ultra Access, Thomson Financial clients will benefit from even lower latency connectivity between exchanges in the New York City area and the Thomson platform.

With Radianz Ultra Access, Thomson Financial clients could have a competitive edge from transaction speeds of less than one millisecond per round trip between local market participants and market data/execution venues. The high speed, fully resilient service reduces TDF latency by fifty percent and was developed in response to the growing use of algorithmic and black box trading strategies, including direct market access (DMA) by broker-dealers, asset managers, prime brokers and hedge funds.

“As the high speed network and communications provider, BT Radianz gives Thomson Financial a product which addresses all spectrums of clients’ market data application needs, from latency sensitivity through the broad proprietary content which Thomson provides,” said Ross Inglis, Director, Real-time Buy-side Products, Thomson Financial.

“Thomson clients will gain an enviable competitive position by having the fastest and most reliable TDF connectivity possible. Radianz Ultra Access provides unrivalled speed and reliability so that Thomson Financial clients are able to connect and execute trades in milliseconds,” said Chris Church, Managing Director Radianz Services, BT Global Financial Services.

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