M4 J1 to J3 7.5tonne VOSA Enforcement

“Vosa is stepping up enforcement activity between junctions 1 and 3 of the M4 after several incidences of vehicles flouting the 7.5 tonne weight restriction in place for the Boston Viaduct.”

Going eastbound on M4 they pull you off at J3 - just before services. How do we get to the MSA■■?
Once in the MSA you can slip out through the access road onto locals.
Have they removed the enforcement signs from the onslip from the roundabout to get access??