The National Archives (in conjunction with FindMyPast.co.uk) have released some records relating to men that joined the Militia between 1806 and 1915.
I’ve extracted the relevent records. A few are indexed under the wrong surname. The Age given in the records is sometimes not correct – the Militia didn’t seem to prioritise confirming an applicant’s age. If you require further details please contact me.
PDF document – Militia Attestations 1806 – 1915