2.11 The market for building and operating a national radio system across England, Wales and Scotland for public safety organisations was relatively small because only a few companies possessed the financial strength to take on such a large project. A further feature reducing the size of the market was the decision to adopt the TETRA standard, which required potential bidding consortia to include companies committed to the development of what was, at the time, an emerging technology. From this small market, the O2-led consortium included two of the key companies leading the development of TETRA technology (see Figure 9). Moreover, the market reduced during the course of the procurement when first Bosch Telecom, and then Ericsson Limited, pulled out.