investUP

The robo tools always look for the best, ie highest, rate. A minimum acceptable rate can be set, and the system will wait, if necessary, to complete the bundle (I.e. Of bids/buys). This minimum can be  absolute, or averaged across the bundle.

In terms of the spread parameters (across platforms, loan types, term, etc) these may be set to absolute or overflow. Absolute splits the investment strictly, and overflow starts at the best, and applies the spread value only when rates are equal across multiple loan parts and/or securities. 

Point releases will add refinements such as consideration given to age of counterparts order, size of platform, etc etc.

Does this help?

Is this ISA in p2p 100% going ahead? Or has hoops still to be jumped through?

You are allowed to have new money in one cash ISA and one stocks and shares ISA under current rules. The cash ISA money can be in more than one account provided by a single ISA manager, so you could have some current year money in a term deposit account, some in a variable rate and some in a mortgage saver scheme if the manager offered all three. The same applies to the S&S ISA if there's a reason to have more than one account. If transferring current year money from one manager to another when more than one account has been used for current year money, you still have to move all of the current year money with the manager, across all of the different accounts.

Nationwide is one cash ISA provider that has more than one account available in its cash ISA that can be used for current year money at the same time.

You can. You can actually open several cash ISAs in one tax year, just not put non ISA cash into more than one (subscribe). But you could open two, transfer cash from a previous years ISA into one then put 'new' cash into the other.

On that note, I think I recall a suggestion in the budget to tweak cash ISAs to allow multiple subscription in a single year. There was also a suggestion about withdrawing and reinserting cash. I don't recall anything more recently but potentially things will be clarified at the same time as the IFISA details come out.

You can have an unlimited number of ISAs of either type using money from past years.

There is currently a self-transfer rule for cash ISAs that says if you withdraw all money from a cash ISA and close it, you can redeposit the part of the balance that was current year money into another cash ISA. However, this is done as an exception rather than a standard feature to be freely used. What jonah mentioned is a plan to make it just routine from autumn 2015 (also mentioned in HMRC ISA Bulletin 65)and presumably without the close the account restriction, though the rules aren't known yet. There is currently a Technical consultation: The Individual Savings Account (Amendment) Regulations 2016 that is open until 8 November 2015. Given that closing date and the 2016 in the regulations title it seems unlikely that the extra flexibility will really happen in autumn 2015. It also appears that the change is going to be restricted to just those accounts that call themselves "flexible" to opt in to them, removing much of the potential benefit, which involves providers deliberately using restrictions like new money only.

The article at wikipedia has a good description of the various ISA rules. The actual rules are in Guidance Notes for ISA Managers with updates in the various Bulletins.

If, as we expect, we're going to be limited to opening just one IFISA next year with new money, then anyone interested in spreading their IFISA investment across multiple platforms would need a product like investUP's to achieve that.