London firm Olswang has completed its first deal for Kleinwort Capital, the acquisition of a 23 million, 45% stake in TV production company Hat Trick Productions.

The management team of Hat Trick will retain 55% of the equity and continue to run the company.

Hat Trick was represented by Macfarlanes, while Osborne Clark advised debt finance provider Barclays.

Two new clients for City firm Berwin Leighton Paisner.

It has advised on what is thought to be the biggest City property deal of the year so far for new client HSH Nordbank as principal debt funder of the 150 million purchase of the landmark 70 Gracechurch Street office building by Active Asset Investment Management from XL Capital.

DLA represented Active, and Nabarro Nathanson the Bank of Scotland, the mezzanine debt provider.

Meanwhile, Berwins has added investment dealing company El Oro Mining and Exploration Company to its list of clients, acting on a 43 million recommended merger with the Exploration Company, advised by US firm McDermott Will & Emery.

East Anglia's Mills & Reeve has won the tender to advise newly formed 2.5 million co-investment vehicle GEIF Ventures, which was set up to reinforce the business angel activity of the Great Eastern Investment Forum.

The Frankfurt office of Norton Rose acted for a new client, Singapore-based Horizon Education & Technologies, on its reverse takeover of Dublin-based fibre- optic company Global Voice Networks, which was advised by German firm Schneider Schiffer Waltl.

Hammonds has become intellectual property adviser to utility company National Grid Transco.

City firm Mayer Brown Rowe & Maw has concluded its first deal for hotel property and management company the Dorchester Group: the purchase of the Hotel Principe di Savoia in Milan.

Finance provider The Royal Bank of Scotland was advised by Addleshaw Goddard.

The Health Foundation has appointed London firm Bates Wells & Braithwaite as its legal adviser.

The 450 million charity aims to improve health and the quality of healthcare for the UK, and distributes 15 million a year in grants.

Consumer credit and motor insurance company Provident Financial has set up its first permanent legal panel and named on it City firms Slaughter & May, Eversheds and Willoughby & Partners, together with Bradford's Last Cawthra Feather.