Sorry I made an assumption that people were aware of EBBR SIDs.
I should have added that instead of following the SID (right turn out, away from the city) he got about 20n.m. lopped off his track with a left turn, which took him right over the built up area. Coupled with increased thrust as he accelerated, iso a thrust reduction for noise abatement, it must have disturbed a few sleepers.
A speed restriction in this case normally also has the effect of noise reduction (Lower thrust setting)