Runway and Apron Works
The 27 September press release is interesting, as PeteAndre says. With no prior experience of UK use of EMAS, no technical guidance to date from the CAA, and their apparent preference for safety zones where land is available, the omens do not look promising for "a change of horses" at this stage.
With regard to the cost breakdown illustrated by the pie chart, I estimate that very roughly one third of the total is for the actual runway work, with another third for the extensive work on the aprons, taxiways and renewal of the drainage system. Over half of the remaining third comprises allowances for design and construction contingencies and inflation, which seems reasonable provision for the unforeseen factors which can crop up during refurbishment/renewal work as opposed to "new build" work.
I don't know what is proposed for the Navaids, if this includes the ILS localisers, glideslope system and the DVOR beacon. Are these to be completely renewed with uprated equipment?