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About the PLA's Executive Committee

The purpose of the executive committee is to oversee the safe and effective operation of all parts of the Port of London Authority. It will deliver the strategy and business plans agreed with the PLA Board of Directors and ensure the organisation works within agreed budgets. It will also provide a focus and mechanism for managing the day to day business of the authority.

Robin Mortimer, Chief Executive

Robin Mortimer joined the Port of London Authority as chief executive officer on 31 March 2014.

Prior to joining the PLA, Robin had 20 years’ experience in the UK Government civil service across a range of Government Departments. He was Private Secretary to the Environment Secretary from 1996-97, Deputy Prime Minister from 1997-98 and to the Transport Secretary from 2001-03. He led the work on the UK Climate Change Bill in 2006 and in 2007, became a Director in Defra where he set up the UK’s Adapting to Climate Change programme, oversaw the creation of the Canal & River Trust and directed policy on air quality and the natural environment.

Robin is currently the Deputy Chair of Maritime UK, a Member of the CBI’s London Council and a trustee of Thames 21.



Julie Tankard, Chief Financial Officer

Julie Tankard, chief financial officer was appointed in October 2017. Julie is a fellow of the Chartered Institute of Management Accountants and has over 25 years of experience in finance, primarily in IT and telecommunications.

Prior to joining the PLA, Julie was a vice president at BT plc and her last role was responsible for group contract & commercial management. Prior to joining BT, Julie was the finance director for Racal Datacom and prior to that was finance director for the networking division of Unisys UK & EMEA. Julie has also been a non-executive director of a mental health trust in Leeds and York since 2013.



Bob Baker, Chief Harbour Master

Bob Baker became PLA chief harbour master in May 2016.

He is responsible for all operational and navigational matters including vessel traffic management, pilotage, harbour services and port security.  Bob joined the PLA from Forth Ports, where he was chief harbour master and a director of Forth Estuary Towage from 2001. Bob’s seagoing career lasted from 1975 to 1991, before he came ashore to work at the Port of Tilbury, latterly as general manager, conventional operations and harbour master.

Bob chairs the UKMPG/BPA Marine Pilot Working Group, is the UK’s representative on the Marine Affairs Committee of the European Sea Ports organisation (ESPO) and is a past president of the UK Harbour Masters Association. He holds an MBA from Henley Management College.



James Trimmer, Director of Planning and Environment

James Trimmer was appointed the Director of Planning and Environment in September 2013. He is a Chartered Surveyor and a Chartered Town Planner.

James joined the PLA in 1999, initially as the Planning Officer. Before this, he spent ten years working within both the public and private sectors, ultimately advising a number of ports and terminal operators throughout the UK on strategic planning matters.  He is corporately responsible for land and marine planning issues, statutory consenting and compliance and environmental issues including the PLA’s commitments on Net Zero.  He has a particular interest in inland freight and is the PLA’s Project Director for the Thames Tideway Tunnel scheme.



Glenn Witham, Director of Human Resources

Glenn Witham was appointed Director of Human Resources in 2002 after joining the PLA in 2000 as Assistant Head of Personnel and Development. He is responsible for managing the Authority’s employment, health and safety, business continuity, and training programmes.

Glenn has nearly 30 years experience in employee relations and has worked in both the private and public sectors. He previously held senior HR positions with Tarmac, Westminster City Council, Southend Hospital, and the London Borough of Hackney. Glenn is a Fellow of the Chartered Institute of Personnel and Development.



Peter Steen, Director of Marine Operations

Peter Steen was appointed director of marine operations in November 2009. He is responsible for PLA marine services, hydrographic services, civil engineering, mechanical and electrical engineering and navigation systems engineering.

Peter joined the PLA in 1989 as a duty officer at the Thames Barrier Navigation Centre after 17 years at sea, having served onboard vessels as varied as general cargo and bulk carriers on deep sea routes, inshore survey vessels, dive support craft, and tugs in the North Sea oil fields. He later moved to the Salvage Team and was appointed marine services manager, overseeing the PLA's diving, salvage, and oil spill clearance operations, in 1996.



Alistair Gale, Director of Corporate Affairs

Alistair Gale joined the PLA as Director of Corporate Affairs in August 2006.

He leads on stakeholder engagement, internal comms, strategy and Thames Vision development. Prior to joining the PLA, Alistair set up and ran the in-house communications function for the UK’s largest cement maker, Blue Circle, remaining through the takeover by the Lafarge group and subsequent integration. Alistair has a degree in Geography from the University of Southampton.