Question from Stuart - Sir John Neville

Sir John Neville, 3rd Baron Latimer

This is a somewhat layered question;

I'm currently researching Henry VIII's 1513 campaign in France, more specifically the contingent of border horse which was part of Henry Percy's retinue which i believe to have have been led by Sir John Neville but I'm not 100%

At that time that would have made him around 20 years of age so a contemporary of Henry's I guess. I've read that he was knighted during the campaign and was one of the kings spears.

Does anyone know who led the border horse and also, a very nice bonus would be an idea of their heraldry.

Sir Rhys / Rees ap Thomas is mentioned quite a bit in connection to skirmishing and reconnaissance with light cavalry but I can't un-thread whether these were the demilancers or scurrers / prickers or both.