Boris Johnson has kicked off his premiership with one of the most brutal reshuffles in modern political history. But amidst all the bloodshed, what does it mean for the ‘Territorial Offices’: Wales, Scotland, and Northern Ireland?

Of the three Secretaries of State for the devolved nations, Alun Cairns is the only one to continue to serve in the new administration. On the face of it this looks like quite a feat, given that he campaigned to Remain in 2016 – but as we point out elsewhere this morning, one’s stance on Brexit is less important at the minute than one’s stance on Johnson.

Cairns staying in post means that he can continue to counter the efforts of Mark Drakeford, the small-n nationalist First Minister of Wales, to use Brexit to try and wring more constitutional concessions out of London. In particular there is a fight brewing over Johnson’s plans to replace EU grants with a Westminster-operated ‘Shared Prosperity Fund’, which devocrats fear will increase the role of the British Government in devolved nations.

During the leadership election, Cairns called on whoever won to set up a dedicated Downing Street team focused on protecting the Union. Let’s hope his new boss heeds that advice.

At the Northern Irish Office, meanwhile, Johnson’s decision is surprising and, if we’re honest, disappointing. Whilst he has cleared the extraordinarily low bar set by Jeremy Hunt, who proposed to keep the disastrous Karen Bradley in post, Julian Smith is not the man I would have chosen to send to this crucial ministry at this particular hour.

Whilst there is an argument to be made that Smith will have important first-hand experience dealing with the Democratic Unionists due to his service as Chief Whip, there is little evidence that his relationship with them is particularly good. As Sam McBride points out, this is the third pro-Remain Ulster Secretary in a row, and Smith has clashed with the DUP over the backstop. He is scarcely the man to take the fight to those spinning for Dublin in the British, Irish, and European press.

This is especially disappointing because earlier reports suggested that the position was hotly contested, with the Sun reporting that “one of the most hotly fought spats is over who will get the Cabinet job of Northern Ireland Secretary.” Gavin Williamson, who negotiated the original Conservative/DUP pact in 2017, was said to be contending with Conor Burns, who would be the first-ever Northern Irish-born Roman Catholic to serve in the role.

Instead, the position seems once again to have been used as somewhere to place a minister you need to put in the Cabinet – and a role for the former Chief Whip must probably always be found – but for whatever reason don’t want to give something with a higher profile. We must hope that, should Johnson win an autumn election, he takes the opportunity to appoint someone else.

Finally, Scotland. The decision to dismiss David Mundell is an interesting one, because the former Scottish Secretary was a close ally of Ruth Davidson and the decision has reportedly strained relations (yet further…) between the new Prime Minister and the leader of the Scottish Conservatives.

Of course, there is definitely a case for a fresh face at the Scottish Office. Notwithstanding any criticism of Mundell’s tenure, and he does have his critics, it is a simple fact that he has served in the post for nine years – and for seven of them he was the Party’s only Scottish MP. A happy consequence of the 2017 breakthrough is that Johnson now has a much broader pool to draw on when it comes to staffing the Scottish Office.

There is also the fact that Mundell was one of those Secretaries of State who defied the whip on Brexit issues under Theresa May. If Johnson is looking to assert his authority, cracking down on such conduct was almost inevitable.

Although he has a lower profile than some other members of the 2017 intake, Jack is a well-respected and long-serving figure in the Scottish Conservatives. He also holds his borders seat – once the only Tory seat in Scotland from 2001 to 2005 – with a relatively healthy majority of over 5,600 votes. Perhaps most importantly, he voted Leave in 2016.

With Stephen Daisley reporting that certain anonymous “allies of Ruth Davidson” are once again talking up the prospect of splitting off the Scottish Tories – a scheme the woman herself has always rejected in no uncertain terms – Jack’s appointment once again highlights the tensions between their Westminster caucus and the Conservative leadership in Edinburgh. Given that this Government owes its existence to the Scottish Conservatives’ revival, Johnson and his allies must treat them with respect and take their concerns seriously.