Just found the distances for an intersection departure from 08 which is comparable to Southend's full length
TORA = Takeoff run available. The length of runway declared available and suitable for the ground run of an airplane taking off
TODA = Takeoff Distance Available – The length of the takeoff run available plus the length of the clearway, if clearway is provided.[6]
(The clearway length allowed must lie within the aerodrome or airport boundary. According to the Federal Aviation Regulations and Joint Aviation Requirements (JAR) TODA is the lesser of TORA plus clearway or 1.5 times TORA).
ASDA= Accelerate-Stop Distance Available – The length of the takeoff run available plus the length of the stopway, if stopway is provided.[6]
Luton
TORA 1688m
TODA 2532m
ASDA 2162m
Southend
TORA 1739m
TODA 1799m
ASDA 1739m (23 end)
LDA 1604m
PDF here of all airports
https://www.google.co.uk/url?sa=t&rc...L-g2DQ&cad=rja