High Court action has been launched over a 1996 terrorist bomb blast which left Manchester's Corn Exchange in ruins. Frogmore Investments, owners of the Corn Exchange, have issued a claim in London for more than £750,000 against property valuers King Sturge and Co. Frogmore claims that in valuing the premises, King Sturge miscalculated the size of the building. The firm based its valuation of £25.3m on a total floor space of 19,010 sq m when the actual size is 22,285 sq m. It is claimed that if the true size had been used for valuation purposes the value should have been £29.7m. As a result of the alleged undervaluation, insurers reduced the claim which followed the bomb blast by £765,240. In a claim which alleges negligence and breaches of contract against King Sturge, Frogmore is claiming payment of this sum.

Claim issued by Titmuss Sainer Dechert, London EC4.

VCP Communications of London N1 is suing Dr Bartholomew Sayle and Deborah Whiteway, both trading as the Breakthrough International Group, of London W11, for £33,127.23 for work done and materials supplied at their request, but for which the company claims it has not been paid. VCP Communications also seeks interest of £686.52 and continuing interest of £7.26 a day.

Claim issued by Kingsford Stacey Blackwell, London WC2.

Philip Lee, administrator of the estate of the late Paula Lee, is suing Dr J Barrett, Dr J Denner, Dr G Byars, Dr T Kimber, all of Littlehampton, and Mr JS Weighill FRCS, of Hove, for damages over his wife's death, which he alleges was caused by their negligence in 1990. He brings his claim under the Fatal Accidents Act 1976 and the Law Reform (Miscellaneous Provisions) Act 1934.

Claim issued by Marsh Ferriman & Cheale, Worthing.

Edinburgh-based Morrison Construction is suing Georgian International and Anthony Feldman and Co, both of Portman Square, London W1, for an account and repayment of £20,000 plus interest, or the balance of that sum.

Claim issued by McGrigor Donald, London EC4.

The National Grid is suing builder Kvaerner Construction (Regions) for damages of more than £130,000 in respect of damage to underground cables. The cables underneath Balm Road and Church Street in Hunslet, Leeds, were allegedly damaged when Kvaerner was carrying out work for Leeds City Council in April 1993. The claim says repair work cost £131,045.83. The National Grid is additionally seeking £61,748 interest and continuing interest of £28.72 a day. It is accusing Kvaerner Construction of negligence in failing to locate the cables and avoid them, failing to use prudent and safe digging practices, and failing to work in accordance with Health and Safety Executive guidance.

Claim issued by Beachcroft Wansbroughs, Leeds.