Royal Regiment of Scotland collar badges (2) The Royal Regiment of Scotland is the senior and only Scottish line infantry regiment of the British Army Infantry. It consists of four regular and two territorial battalions, plus an incremental company, each formerly an individual regiment (with the exception of the first battalion, which is an amalgamation of two regiments). However, each battalion maintains its former regimental Pipes & Drums to carry on the traditions of their antecedent regiments.