More likely to have originated during the War of the Austrian Succession (1740 to 1748) than those of the Spanish (1701 to 1714 - Marlborough).

The Scottish Army establishment did not join the List of the British Army until after 1707 and consisted of:

Scots Guards
Royal Scots*
Kings Own Scottish Borderers
The Cameronians*
Royal Scots Fusiliers
Scots Greys

Those marked * served under Marlborough but as most of these Regiments up until their incorporation into the British Army had served in Swedish or French service meant that they were viewed as "suspect" particularly when the time frame is considered (1701 to 1745 - Jacobite Rebellions 1715 & 1745). The other factor is that all of the above regiments were Scottish Lowland Regiments. It was not until the War of the Austrian Succession that "Highland Regiments" started to appear on the British Army List.