The London Irish Rifles (LIR) was a reserve infantry regiment and then company of the British Army. The unit's final incarnation was as D (London Irish Rifles) Company, the London Regiment. On 1 May 2022 (delayed from the originally intended 1 April 2022) soldiers in the company transferred to foot guards regiments and the company became No 15 (Loos) Company, Irish Guards, 1st Battalion London Guards.