Some clarification is required.
anneclarke wrote:Years later the Trustees of the Trust want to transfer the trust property from the mother's name (as one of the trustees) to one of the children and a trustee, to continue holding the property in trust for all of the four children under the Trust, in equal shares (25% each).
What you have described here is merely a transfer of bare legal title (no value). Simply transferring bare legal title jointly to one of the children would not pass any value to him. Presumably the child would be a joint legal owner either as a trustee or a nominee for the trustees.
What type of trust is it? Presumably not a bare trust so for SDLT purposes the property is held by the trustees.
How is the beneficiary under the trust going to raise a mortgage on a property in respect of which he isn't a beneficial owner? This again ties-in with a need to clarify what type of trust it is.
Aside from clarifying the above, section 75A could be a problem here.