Tax Employment Question

Hi All, - I have been made redundant here in Belgium but I have been able to find another job quickly but it is based in the UK (UK Contract). So for a year I will be commuting to the UK while my family stay here. I had a short meeting with Deloitte who have said that I will be subject to double taxation for any workdays I have out of the UK. (Eg Belgium / France etc). Also that there is a new implemented local tax that I would need to find out details with my Gemeente / Commune. Pretty scary stuff and absolutely sure what they are saying is correct. But does anyone have personal experience or information how much this is going to cost. Belgium is a country of compromise so I am hoping there is a solution out there that avoids a double /triple whammy. Cheers