Ken, WY1968 (Fullers) is awful hard to beat. And personally, I don't use biscuit with MO - I think MO is toasty enough. I know some brewers do use both, though. I'm sure it'll be good.
You stole my comment. Exactly my thoughts as I read through the recipe. I don't think MO needs biscuit, but people do it. No harm will come from it, for sure.
1968 is a personal favorite yeast for all English styles. I've not used 007, so I can't compare, but you can't go wrong with 1968.