Queen Elizabeth I's reign was 1558–1603 (The Elizabethan period) and as such belted plaids were the only highland kilt (1594 was the first documented mention of the belted plaid) There were no fly plaids as we know them today, there was no little kilt. I can't imagine that there were formal and day belted plaids at that time. I really don't think that the website you refer to, has too much in the way of documented facts, more romanticised wishing than anything