These figures are rot. Sorry if I led anyone astray. I filtered on Unitab Rating Rank instead of Unitab SP Rank. I should have realised something was wrong with a group of favourites with a 16.8% strike rate.

The correct figures should be:

Maiden unitab favourites:
Bets: 5376
Wins: 1836
SR: 34.2%
LOT: 9.7%

Maiden unitab favourites that qualify for Michael's Lay System:
Bets: 1854
Wins: 561
SR: 30.3
LOT: 11.4

Not important now as the prepost fave appears to be the one to lay, not the SP fave.

Cheers