Small cap round-up: Silverdell, HiWave, Straight

Also includes Motive TV and Software Quality Systems

Environmental support services group Silverdell is to buy decommissioning and dismantling services provider EDS Group for £15m. The firm called the deal a 'transformational acquisition' that was expected to be immediately earnings enhancing and would create a company with scale and global reach, accelerating its planned expansion into Canada and Australasia. Investors were impressed and pushed the stock up 16% in early morning trading.

HiWave Technologies plunged 34% early on after the firm said a development agreement with a major US company had not been finalised and it could not rely on any revenue from this potential contract in the current financial year. This would have an immediate impact on the firm's revenue expectations for the year to September 2012 and would also impact the year to September 2013, it said. The company also announced it had lost £1.76m in the six months to the end of March.

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