What about niche deliverers – why would they engage with a general consortium?

Contracts are likely to get larger, not only in terms of their financial value but also in respect of the range and breadth of service provision that is required.  There is a threat of smaller, niche providers being marginalised within this changing environment, unless they are able to join forces with other similarly situated organisations and present a bigger and broader offer to the commissioners through working together.  The consortium will actively facilitate this.