When we have played Small Heath the police tend to form a physical barrier down the Witton Lane to the coach park. That probably helps as believe it or not, without fail, the Noses would bring 30 plus coaches to the Villa Park, so the majority of support can be pushed down one route.
I have seen the WMP use temporary mental barriers before which might be an option, as if you’re an away fan, you will exit in-between R block in the North stand and any other foot traffic coming from the Witton or Holte End.
There is a more natural segregation at your place, with the station the only time you really mingle, although they kept us held back outside last time while Albion fans went through so there were no issues. Plenty of gesturing and posturing, but that is just the state of football these days.
I have always found that night derbies have a very sinister feel to them and I am surprised WMP have acquiesced to the evening kick offs, particularly with thoughts on the last three night derby games involving us being gateways to the 1980s.