The West Midlands Police and Crime Commissioner has joined calls to create a region-wide combined authority - as Solihull continues to be a fly in the ointment.
Talks are ongoing about setting up a region-wide body which will be key to accessing billions of pounds of devolved funding in the next Parliament.
David Jamieson, currently the only person elected to a West Midland role, said it was vital the region got on with creating a combined authority, and not miss out on the chance of getting devolved powers from Whitehall.
The Greater Manchester combined authority has already secured £6 billion spending powers after seeing the area's health and social care budget devolved from Whitehall.
The West Midlands has similar ambitions but Solihull continues to shun its invitation to the party, pledging to respond after the forthcoming General Election.
Mr Jamieson said: "There is a change going to take place and the real agenda after May will be about English devolution – and the West Midlands must be part of that.
"I don't know what that will look like but whatever model comes about we will play our part as the job, in terms of criminality, policing and economic success, are all intertwined. There has to be a regional economic body. I am not sure what that looks like but that means there has to be a buy-in."
Authorities in Birmingham and the Black Country agreed a historic accord in November to create a new authority, overseeing economic development and transport as well as other powers.
However, Solihull Metropolitan Borough Council is yet to be convinced it is the answer for this region. Leader Bob Sleigh told the Post the authority's position had not changed since December.
He said: "There is a fair amount of work that needs to be undertaken about what a combined authority would bring to the West Midlands.
"We need to identify what area it would cover, its relationship with the Greater Birmingham and Solihull LEP and the EU, for instance."
When asked about progress being made in Greater Manchester, Coun Sleigh added: "We have to understand the timescale with Manchester. This has taken several years to put into place, and the geography of Greater Manchester is very different to here in the West Midlands.
"We have three LEPs, they have one, and we need to know what the relationships with them will be."
Sandwell Metropolitan Borough Council leader Darren Cooper, who has played a leading role in setting up an accord, said Solihull was being kept abreast of progress.
He said: "We are progressing. The background work to it is being put together, spelling out the benefits and the offer that we are going to put to the Government in terms of what we want to achieve.
"Solihull are part of that work. They have said they aren't going to make a decision until after the election but the work continues and they are being involved.
"There are positive talks going on. The only concern is the recent announcements by the Chancellor on Greater Manchester show how things are moving. We have to be careful not to be left behind."