Callebaut are part of a larger corp 'Barry Callebaut'. It is now a massive global company with the brand callebaut with roots in Belgium and Barry (formerly Cacao Barry) from France. This conglomeration happened in the 1990's when Callebaut took over. In my opinion cacoa Barry was always a far superior couverture especially when dealing with anything above 55% or milk, Callebaut was always for me about making mousses or ganache and barry for the fine stuff. In the UK callebaut purchased 'Lesmi' (think thats how you spell it), a chocolate manufacturer based North of London, which is now branded Callebaut. I would guess that if you are aquiring a trade 'industriel' product in the UK then it is produced in the UK and if it is on a retail shelve it would probably from belgium.
I would agree with Breton Beats that its not in the same league as Val, but it is very good chocolate that will certainly be easier to handle.
Just for the record my favourite medium cost couverture that i would say will match Val any day of the week is 'Guayaquil 72%' made by DGF (distributers grossistes de France), available worldwide through nominated trade suppliers.
Sorry for sounding such a bore, I just love chocolate...........