M25 Contract Details

Section Length (km) Engineer Contractor Tender Price
Dartford Tunnel Southern Approach 2.5 Kent CC Laing/Birse £15.9m
Dartford to Swanley (J1 to J3) 5.3 SERCU (Kent SU) Laing £5.5m
Swanley to Sevenoaks (J3 to J5) 12.9 Kent CC Laing £38.5m
Sevenoaks Interchange (J5) 1.5 SERCU (Kent SU) Cementation £7.2m
Sundridge Road to Westerham 6.3 SERCU (Kent SU) Gleeson £6.3m
Westerham to Godstone (J6) 8.1 SERCU (Surrey SU) Bovis £8.4m
Godstone to Reigate (J6 to J8) 7.2 SERCU (Surrey SU) French £10.4m
Reigate to Leatherhead (J8 to J9) 7.2 W S Atkins Farr - Birse £14.6m
Leatherhead interchange (J9) 4.4 W S Atkins Balfour Beatty £14.3m
Leatherhead to Wisley 6.9 W S Atkins Fairclough(AMEC) £17.2m
Wisley to Chertsey (J10 to J11) 9.4 W S Atkins Balfour Beatty £20.7m
Advance bridges   SERCU (Surrey SU) & Gifford Fairclough(AMEC), Balfour Beatty & Monk £6.4m
Chertsey to Thorpe (J11 to J12) 3.8 SERCU (Surrey SU) Bovis £7.6m
Thorpe to Egham (J12 to J13) 4.0 SERCU (Surrey SU) Bovis/Fairclough(AMEC) £9.9m
Egham to Yeoveney (J13 to J14) 1.5 SERCU (Surrey SU) & Ove Arup Bovis/Fairclough(AMEC) £9.9m
Yeoveney to Airport spur 3.2 SERCU (Surrey SU) Balfour Beatty £14.8m
Airport spur to M4 (15) 3.3 W S Atkins Cementation £44.5m
M4 to Iver Heath (J15 to J16) 6.8 ERCU (Bucks SU) Wimpey £25.3m
M40 Interchange (J16) 2.6 ERCU (Bucks SU) Tarmac (now Carrilion Construction) £21.1m
M40 to Maple Cross
(J16 to J17)
7.7 ERCU (Bucks SU) & Halcrow Laing £20.0m
Maple Cross to Hunton Bridge
(J17 to J19)
9.6 ERCU Costain £5.8m
Micklefield to Bedmond Road
(J19 to J20)
5.8 Colquhoun/ERCU (Herts SU) Sir A McAlpine/ Fairclough(AMEC) Cons'n £26.8m
Bedmond Road to Bricket Wood
(J20 to J21A)
3.1 Colquhoun/ERCU (Herts SU) Balfour Beatty £17.7m
Bricket Wood to London Colney
(J21A to J22)
6.6 Colquhoun/ERCU (Herts SU) Edmund Nuttall £15.2m
London Colney to South Mimms
(J22 to J23)
6.0 Colquhoun/ERCU (Herts SU) Balfour Beatty £21.5m
South Mimms to Potters Bar
(J23 to J24)
4.3 ERCU Balfour Beatty £4.9m
Potters Bar to Waltham Cross
(J24 to J25)
8.5 GLC Sir A McAlpine £15.8m
Waltham Cross (J25) to River Lee 2.9 ERCU (Herts SU)/ Maunsell Tarmac (now Carrilion Construction) £28.6m
River Lee to Upshire (J26) 3.2 ERCU (Herts SU)/ Maunsell Tarmac (now Carrilion Construction) £13.1m
Upshire to Theydon Garnon (J26 to J27) 6.6 ERCU (Herts SU)/ Maunsell Laing £29.1m
Theydon Garnon (J27) to Passingford Bridge 4.6 ERCU (Essex SU)/ W S Atkins Costain £21.2m
Passingford Bridge to Brentwood (J28) 8.3 ERCU (Essex SU)/ Ove Arup Laing £19.9m
Brentwood to North Ockendon (J28 to J29) 8.6 Mott Hay and Anderson Costain £31.1m
North Ockendon(J29) to Stifford Road 4.0 Mott Hay and Anderson Laing £7.2m
Stifford Road to Mar Dyke 2.2 Mott Hay and Anderson Laing £11.0m
Dartford Tunnel North Approach 1.2 Mott Hay and Anderson Edmund Nuttall £11.1m
Dartford Tunnel 2.2 Mott Hay and Anderson Balfour Beatty £33.4m