UKPIM HOLDCO LIMITED

FIRST FLOOR 6 ST. ANDREW STREET, LONDON, UNITED KINGDOM, EC4A 3AE

ROMFORD HOLDCO LIMITED

C/O DSJ PARTNERS, 2ND FLOOR, 1 BELL STREET, LONDON, ENGLAND, NW1 5BY

UTILITY GRID INSTALLATIONS LIMITED

Born June 1948

10 UPPER BANK STREET, LONDON, E14 5JJ

DHCM HOLDCO LIMITED

45 PALL MALL, LONDON, UNITED KINGDOM, SW1Y 5JG

DHCM HOLDCO LIMITED

45 PALL MALL, LONDON, UNITED KINGDOM, SW1Y 5JG

AFP UK HOLDCO LIMITED

250 WHARFEDALE ROAD, WOKINGHAM, BERKSHIRE, ENGLAND, RG41 5TP

BLACK ROCK HOLDCO 1 LLP

81 FOUNTAIN STREET, MANCHESTER, ENGLAND, M2 2EE

KIER FOLEY STREET HOLDCO 1

81 FOUNTAIN STREET, MANCHESTER, ENGLAND, M2 2EE

KIER READING HOLDCO 1 LLP

2nd Floor Optimum House, Clippers Quay, Salford, England, M50 3XP

CITIZENM OPERATIONS HOLDCO 1 B.V.

219 Leidseweg, Voorschoten, Netherlands, 2253AE

FARINGTON MOSS HOLDCO 1 LLP

81 FOUNTAIN STREET, MANCHESTER, ENGLAND, M2 2EE

KIER GBE HOLDCO 1 LLP

TEMPSFORD HALL, SANDY, BEDFORDSHIRE, UNITED KINGDOM, SG19 2BD

PORTAL HOLDCO LIMITED

FIRST FLOOR 3800 PARKSIDE, BIRMINGHAM BUSINESS PARK, BIRMINGHAM, B37 7YG

CASTELLAIN HOLDCO LIMITED

34 NEW CAVENDISH STREET, LONDON, W1G 8UB

GRIDPULSE LIMITED

Born July 1975

9 STOUGHTON CLOSE, LEICESTER, LEICESTERSHIRE, LE2 4DT

UKPIM HOLDCO LIMITED

21ST FLOOR EUSTON TOWER, 286 EUSTON ROAD, LONDON, NW1 3DP

UKPIM HOLDCO LIMITED

FIRST FLOOR 6 ST. ANDREW STREET, LONDON, UNITED KINGDOM, EC4A 3AE

RUSHMERE HOLDCO LIMITED

LEVEL 1 10 PORTMAN SQUARE, LONDON, UNITED KINGDOM, W1H 6AZ

NATIONAL GRID PLUS LIMITED

1-3 STRAND, LONDON, WC2N 5EH

ZANDERA (HOLDCO) LIMITED

16 Beaufort Court Admirals Way, Canary Wharf, London, United Kingdom, E14 9XL