Right, so updated images for higher quality.
Black Templar Assault - Brother Konstantin
He was created with mostly Black Templar conversion parts. I used Sanguinary Guard legs and the Jump Pack from the GW 'Space Marine Chaplain with Jump Pack'. And a Deathwatch Shoulder Pad.
Ultramarine Librarian - Brother Servius
He was created with Death Company Legs and Sanguinary Guard Torso. The Icon on his backpack was from the Space Marine Command kit. The Sword was also Sanguinary. The Left arm had the original hand cut off and replaced with a Grey Knight force push hand. To his leg I attached a Grey Knight terminator book.
Blood Angel Tactical Marine - Brother Leonidas
He was created literally entirely with Saguinary Guard bits, apart from the Backpack which is Death Company issue. With the dagger, I took a Sanguinary ornamental dagger case (for hip decoration) and cut off the handle. I cleaned up the scabbard and glued that to the hip. I then took a standard issue dagger and cut away the blade, and glued that to the handle of the Sanguinary ornamental dagger. I then cut away the grip of the dagger handle leaving the blood drop on the end and the hand guard and glued that to a standard gun wielding hand.
Dark Angel Techpriest - Brother [Dark Angel]
He was created with a mixture of Dark Angel bits and the £13 metal cast Techpriest from GW. I used the Tech-Servo backpack entirely. I then cut the hand and axe from the techpriest metal arm and glued it to a plastic arm (so I could include the Deathwatch shoulder pad). I didn't know the existed until buying bits for this model, but, I attached a Dark Angels Techpriest shoulder pad to a standard Bolt Pistol arm, and glued a Dark Angel Techpriest helmet to the Dark Angel body.