Benchmarking of international railway infrastructure managers' expenditure (covering operations, support, maintenance and renewals activities)

We require a report benchmarking Network Rail's operations, support, maintenance and renewals expenditure against suitably selected international railway infrastructure managers. This is to help us to understand whether and to what extent there is a gap between the cost and efficiency of Network Rail's operations, support, maintenance and renewals expenditure and that of comparators and the reasons for any differences so we can identify potential efficiency or activity opportunities. We invite bidders to explain their proposed approach, together with its strengths and limitations.