Complex sentence: Around noon, Ponath re-assembled his group near Derna airfield and cut one of the British withdrawal routes and the 5th Royal Tank Regiment (5th RTR: Lieutenant-Colonel H. D. Drew), repulsed two determined attacks and then counter-attacked with the last four British tanks.
Split into simpler sentences: Around noon, Ponath re-assembled his group near Derna airfield and cut one of the British withdrawal routes. The 5th Royal Tank Regiment (5th RTR, Lieutenant-Colonel H. D. Drew), repulsed two determined attacks and then counter-attacked with the last four British tanks.