London - Leading global law firm Mayer Brown advised Numis Securities Limited in relation to its role as broker and nominated adviser to the admission to AIM of Retroscreen Virology Group plc, the viral challenge and “virometrics” specialist.

By way of a placing of 18,750,000 new shares, Retroscreen raised gross proceeds of £15 million for the purposes of allowing it to pursue its development strategy. A further £2.4 million, before expenses, was raised for selling shareholders by means of a placing of existing shares.

Numis Securities Limited is a leading independent investment banking and institutional stockbroking business. It is the trading subsidiary of Numis Corporation plc, whose shares are quoted on AIM. Numis has research, sales, trading, broking, capital raising and corporate finance capabilities in 14 sectors, including building & property, engineering, life sciences, media, metals & mining, new energy & emissions, non-life insurance, oil & gas, retail, speciality & other financials, smaller companies, support services, technology and travel & leisure.

Retroscreen is a virology healthcare business that provides clinical services, focused on the Viral Challenge Model, and pre-clinical analytical services primarily to large, global pharmaceutical companies and biotechnology organisations.

Kate Ball-Dodd, Corporate partner at Mayer Brown, said: "We are delighted to have advised long standing client Numis in their role as adviser to Retroscreen in helping it achieve its development strategy."

The Mayer Brown team was led by Corporate partner Kate Ball-Dodd with support from Corporate associates Simon Allison and David Green.

This is the second transaction on which Mayer Brown has acted for Numis Securities this year. A team led by Kate Ball-Dodd with support from Corporate senior associate, Connor Cahalane, and IP senior associate, Oliver Yaros acted for Numis in its recent acquisition of rights to a series of small cap indicies, now known as the Numis Smaller Companies Index, which was announced in March 2012.