That’s a nice looking 2100! I remember quite a few companies moving away (pardon the pun!) from the trusted old Bedford work horse and changing to Dafs or Mercs. Those cabs created challenges for the body builders due to the requirement to tip the cab to access the mechanics. There were some virtually useless luton`s put on some bodies until most gave up and just put a normal box, without a luton, on the back.
We had a 2100 with a large, two man, sleeper pod upstairs! Now that had some space to live in! 
Also, in later years, it seems some companies thought the 2100 to big an engine and started ordering vehicles supplied with the 1900 