Train to Albert or Arras
Is there a train from Beauvais to Albert or Arras?
Yes, there are trains to either Albert or Arras. Travel time varies, for Albert it's about 2.5 to 4 hours depending on what train you take. For Arras travel time seems to be a little better at 2.5 to 3.5 hours depending on the train you take.
With regards to a reservation, you really don't need one you can buy your tickets the day you travel.