Setting up Charitable Trust for collection of Commuted Sums - Public forum - Planning Advisory Service (PAS)

The National Park Authority are considering creating a Charitable Trust to hold commuted sums received as a result of s106 negoations for affordable housing. The idea is to create some control over the spending of commuted sums within the park boundary. Currently commuted sums go to the respective Unitary Authority Housing Departments within our boundary. (The NPA is the Local Planning Authority but not the housing authority - we have 7 Unitary Authorities within our boundary). Historically it has been difficult to track the receipt and spending of this money. We are seeking to ensure that the amount negotiated is directly related to delivery within the park. Does anybody have experience of creating a charitable trust for this purpose? Are there issues with the amount of time that the trust may be able to hold the moneys. I note the discussions on this forum about the usual 5 year clawback clause. We are particularly concerned that the trust may need to collect 3 or 4 contributions before the amount required to deliver a single dwelling is acheived. Timescales may dictate that moneys have to be repaid before the amount is collected. Any advice appreciated.