I don't have much in the way of information regarding this set of photos, so instead I'll post some info from their pipe band's website:

Canadian Scottish Regiment Pipes and Drums
Victoria, British Columbia, Canada

The Canadian Scottish Regiment (Princess Mary's) is Vancouver Island's infantry unit. Its origin dates from 1912, when the 50th Regiment (unofficially the Gordon Highlanders of Canada) was created.

During the First World War, the 50th Gordons was one of four highland regiments that combined to form the 16th Battalion (Canadian Scottish), Canadian Expeditionary Force. The other units included the Seaforth Highlanders of Canada, the Cameron Highlanders of Canada and the 91st Regiment Canadian Highlanders. This particular battalion quickly became famous, winning numerous battle honours during the campaign.

In the First World War pipers regularly played the troops "over the top". The 16th Battalion featured four Victoria Cross winners, including Piper James Richardson, VC, the only Canadian piper to have ever received this, the highest Canadian military honour.

In 1920 the Canadian Scottish Regiment was formed with headquarters in Victoria. In 1927 an alliance was created with The Royal Scots. From that alliance the Canadian Scottish adopted Hunting Stewart as the regimental tartan, with uniform patterned after "the Dandy 9th", the Territorial Army Highland Battalion of The Royal Scots.

The 1st Battalion Canadian Scottish Pipes and Drums served with the regiment throughout the Second World War. Until 1949 that pipe band wore Lennox tartan, which was the band tartan of the old 16th Battalion in the First World War. Today one Lennox tartan ribbon is retained in the full dress uniform of Canadian Scottish pipers, with the Hunting Stewart kilt and plaid.

The 30 member Pipes and Drums are an authorized band of the Canadian Armed Forces. Members comprise both serving personnel and civilian volunteers. They present the most visible element of the Regiment, performing in many of Victoria's major public events.

Over the last few years band members have performed outside of British Columbia in Hawaii, California, Washington State, New Orleans, Memphis, Calgary and Ottawa. The most recent international performance highlights were appearances at the Edinburgh Military Tattoo and the Netherlands National Tattoo.

Official site of the Canadian Scottish Regiment (Princess Mary's)

Regimental Museum