Siris revised its bid to 180 pence per share following discussions, London-listed Equiniti said. In early April, Siris submitted a non-binding proposal for 170 pence per share.
Rothschild & Co and Citi are acting as Equiniti's advisers
($1 = 0.7210 pounds)
(Reporting by Vishwadha Chander in Bengaluru; Editing by Shounak Dasgupta)