ESP is a sub division of Drennen International and is headed up by Adam Penning and also endorsed/Consulted/designed by Terry Hearn.
They make specialist carp tackle.
Everything from rods, line, hooks, swivels etc etc.
Their hooks are particularly good and, as Bob will testify, have been taken up by the barbel boys (me included).
Their Raptors (as in the dinosaur) are super sharp and very strong and they make several shapes of this, being the G4 and T6.
Their new Big T's are an adaptation of the old hooks, they have a Teflon coating (so they penetrate easier) and are heavier gauge (so they are even stronger).
Their only draw back, IMHO, is that because they are so sharp, the points have a tendency to blunt (or slightly bend over) when they come into contact with gravel etc.