UK Golfers Elite (2014 Champs) would love to be involved again, however, your guideline:
"Team of 12 for each fixture should include at least one player from 5 of the 6 tiers."
makes it a tad awkward, as we simply don't have enough players in the Pro, Tour Pro, or Master tiers to make this possible.
edit: I've put a recruitment post in the CCC, and hope to get some new blood in, and be able to meet your quotas - will keep you informed :-)
Steve.