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Awesome work, but there are some bugs in the XML files.
Likely bugs:

1. BCSO_Valor_21.xml, Stage 2 (lines 63–68): IDs 23 and 24 are in the list that turns lights off, and then they're also given their own flash patterns (<Item id="23" …> and <Item id="24" …>). Which setting wins depends on parse order. Stage 1 in the same file correctly leaves 23 and 24 out of that list (it uses …21,22,25,26…). The likely fix is to remove 23,24 from the Stage 2 list.
2. BCSO Stanier.xml, Stage 1 (lines 49–58): the siren settings make lights 5 and 6 sync to the siren beat, but lines 5 and 6 are also in the Stage 1 list that turns them off. That makes the setting pointless. Stage 2 is the stage that leaves 5 and 6 on, so the block may belong there, or it was meant for lights 7 and 8.
3. BCSO_Unmarked_Stanier.xml, Rear Warning (lines 74–83): same problem. Light 5 is set to sync to the beat but is also in the list of lights turned off. The only lights left on in that mode are 19 and 20, so the setting probably should have targeted those.

Minor problems

4. BCSO Stanier.xml, TA Diverge (line 111): the speed override speed value="64" covers lights 11,12,13,16,17,18 but leaves out 14 and 15. Those two are still given a pattern in this mode, so they flash at the default speed and drift out of step with the others. The other directional-light (TA) modes include all of 11–18.
5. BCSO_Unmarked_Stanier.xml, line 29: Siren1_Manual uses sirens_slow_dir, but Siren1 uses sirens_slow_dir2. Holding the manual button plays a different tone than the toggled siren. In BCSO Stanier.xml, both use dir2.
6. BCSO_Misc..xml: the filename has a double dot. DLS will most likely still load it, but it looks like a typo for BCSO_Misc.xml.

awesome vehicles

amazing vehicle. Some of the best lights of any non R* vehicles. I wish 3 and 7 were working better. Still, amazing work.