SCOTLAND must not have its own civil service despite increasing tensions between Holyrood and Westminster, a committee has heard.

The chief executive of the civil service, John Manzoni, said that strengthening the agency north of the border was a priority, and there would be no cause for Scotland to have its own separate version.

Speaking at a Parliamentary committee this morning, Tory MP David Mundell asked whether there would be any grounds to introduce a separate authority in the “devolved administrations…given where they have reached, pursuing diametrically opposed policies to the UK government and often being the harshest critics of the UK government.”

The former Secretary of State for Scotland asked if it was “sustainable to continue with the one service model”.

Manzoni, who is due to leave the service in March as part of Boris Johnson’s Whitehall shake-up, said that he felt it was essential to have one service, which should be strengthened.

He said:” It is important that we do. This government’s position is that the union is an important institution. The civil service…Of course there are tensions, and discussions. There are different human resource policies in Scotland but we work through those.

“I think it continues to be a very important aspect, having one civil service reaching across the whole of the united kingdom.”

The administration boss said it would be a “political decision” but he would encourage further discussion around how policies affect devolved areas, and how they look “through a devolved administration lens”.

He added: “I think [there needs to be] a greater presence in the devolved administrations, we are doing that.

“We have a big office opening in Edinburgh, Cardiff and Belfast, greater distribution of civil servants from whitehall into the devolved administrations… I think that is going to very important and its on the agenda.”