With regard to the period 2011 to 2017 I would refer the Deputy to the reply given in response to Parliamentary Question Number 767 of 14th December 2017.
I am advised that no expenditure was incurred on external consultancy from my Department's Administrative Budget in 2018, nor has any such expenditure been incurred to date in 2019.
As previously advised to the Deputy in the reply referred to above, my Department commissions engineering, environmental and other experts from time to time to provide technical reports or advice on specific issues. While the providers of these services are consultant engineers, environmental consultants etc., or may describe themselves in other such terms, their work is not classified as consultancy services and is not funded from my Department's Administrative Budget.