Hi Paul
You certainly have a mixed bag there...
I think that the only Mikes Models are some of the horses in the last picture... the chap in that picture waving the sword with the purple cloak looks the a Tabletop Games miniature.
Also in the last picture... most clearly visible in the back row(there are a few others)there looks like a couple of Jacobite Miniatures Men of the South/Southron cavalry.
There looks like a fair scattering of Tabletop Games cavalry in the other shots.
I think that you are correct about the spearmen... Minifigs...
If I spot anything else I will let you know...
I will show you pictures to a friend of mine later today... he is a 15mm fan... he will probably prove me wrong on all accounts
All the best. Aly