The 48th Royal Tank Regiment (48 RTR) was an armoured regiment of the British Army during the Second World War. It was part of the Royal Tank Regiment, itself part of the Royal Armoured Corps.
It was originally formed as a duplicate of the 42nd Royal Tank Regiment, a newly mobilised Territorial Army unit formerly the 23rd (County of London) Battalion
It was part of the 21st Army Tank Brigade equipped with Churchill tanks.
During preliminary engagements before the Battle of Longstop Hill in Tunisia, 1943 it disabled a German Tiger I tank; it was sent back to UK and is currently the only operating Tiger tank in the world, Tiger 131.