Belgium sits atop an arc of coal deposits which starts in northern France and stretches down into Germany. Belgium (and particularly the Netherlands) were also innovators in banking and leaders in manufacturing in the early modern period. Based on these facts, I believe it is utterly plausible that the industrial revolution could have occurred in Belgium before it did OTL in Britain.
With that in mind, what conditions might need to change in or around Belgium to kick-start an earlier industrial revolution?