** Shares of Canadian construction firm up ~3% at C$26.27 after co wins Network Rail contract
** Co says its Atkins business unit won a 1.5 bln pound-contract to design track upgrades across London North West, London North East and East Midland routes for the next decade
** Says upgrade work is due to commence in August and is worth up to C$500 mln in rev to co
** Atkins will perform upgrade work with Balfour Beatty and TSO as part of the Central Rail Systems Alliance
** Also says Atkins recently secured a place on Network Rails’ Signalling and Telecoms framework to deliver projects that have expected value of ~C$295 mln to co
** Including Monday’s gains, stock down ~43% this year (Reporting by Nishara Karuvalli Pathikkal)
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