IPSA has just published the total expenses of all MPs for 2015-16 year. The average MP that year claimed a total of £174,867 to run an office, and to cover travel and accommodation costs. The main part of the sum was spent on staff salaries.
John Redwood claimed a total of £76,487 that year, or 43.7% of the average, mainly to pay staff salaries to assist with casework and constituency support.