By Matthew Davis Staff at Network Rail trousered almost £40million in bonuses last year as passengers faced misery. Services were repeatedly halted by engineering works, yet nearly 13,000 workers got an average £3,000 each. And bosses already pocketing a fortune got average top-ups of £35,000, despite Network Rail being sanctioned for fatal safety failings. Jeremy Westlake, chief finance officer of the agency – which does not run trains but is responsible for tracks and stations – was paid £371,000 last year, plus £19,000 as a bonus. Chief executive Andrew Haines is on £590,000 – although last…