Well, for one thing, these are definitely not Chestnut Bobs.

ID'ing of these skippers is a challenge, and if you have C&P4, there are some species which C&P4 states that "positive separation of the species can only be confirmed through genitalia dissection". Hence characteristics like wing spots and colours are unreliable in the ID.

With the advancement of DNA analysis, it's hoped that one day, we will be able to better ID the species more accurately without resorting to physical appearances and/or dissection.

Having said that, these shots appear to be closer to the Polytremis or Pelopidas species.