The figure front and center is "The Colonel" and whenever possible I use him to represent myself on the tabletop. He is an Artizan Design figure from pack NWF0010-British Officers Afghan War.
The Sikh officer is also from Artizan Designs as is from pack NWF0108-Sikh Officers.
The lovely lady is from Copplestone Castings Female Archaeologists BC19.
The British Officer with the teacup is usually Dr. Watson in his early years prior to him meeting the Great Detective. He is from Artizan Designs NWF0010a-British Officer with Cup of Tea.