A UK Government minister has snubbed a request to appear in front of a Holyrood committee.

Liz Truss, the chief secretary to the Treasury, has turned down the finance committee's request for her to give evidence over the fiscal framework, the funding formula used to distribute money from Westminster to the devolved government.

In a letter to the panel, Truss said she was "unable to accept" the invitation and argued she is responsible to Westminster with regards to the framework, not Holyrood.

Members of the committee said they were "deeply concerned about the refusal".

In a letter to the committee, Truss stated the operation of the fiscal framework was a "shared responsibility" for the Scottish and UK governments.

She added: "The UK Government is accountable to the UK Parliament for its role in operating the fiscal framework, and the Scottish Government is accountable to the Scottish Parliament."

In response to the rejection, the panel said: "The committee has repeatedly stated that full transparency is an essential element in securing public confidence in the operation of the Fiscal Framework.

"It is, therefore, not acceptable that the chief secretary to the Treasury or any other UK minister is unwilling to appear before the committee to discuss the block grant."