Humble SLF here but IIRC it was SOP on a Concorde departure to add a bit of rudder on the initial roll, as the number 4 (or 1, an outboard one anyway) reheat would automatically light later than the others, as the wing vortex would wash over this engine's exhaust just as the reheats were trying to light.
You could feel this at the front of the front cabin as a little 'shimmy' just after power was applied.