The Hampshire-based firm said it had enjoyed a 'much improved' order intake during the second half of this year, supported by new contracts from the defence industry in North America.
An activist investor is hoping to seize control of seven underperforming London-listed investment trusts after urging shareholders on Wednesday to sack their respective boards.
The increase in bills will pay for upgrades to pipes and reservoirs that water firms argue are sorely needed - but will also go towards paying investors.