12 part 1 is NEEPS (anagram of "seen" & "p" from potato)
12 part 2 would be the odd letters from Berliner (BRIE) + another letter, so something like BRINE, BRIDE, BRIEF, etc.
2 part 1 is FIRE/OPALS (anagram of I OF PEARL)
19 part 1 will be anagram of ORDNANCE with another letter, so something along the lines of ORDINANCE, CLARENDON, ...
15 part 1 an anagram of NEAT TAILOR + another letter