The UK's new defence secretary is expected to be announced by Prime Minister Rishi Sunak on Thursday, APA reports citing BBC.
Ben Wallace announced that he would left his post.
Names mentioned by senior Conservatives as potential replacements include Armed Forces Minister James Heappey and Chief Secretary to the Treasury John Glen.
As well as Mr Heappey and Mr Glen, there are reports that a Tory MP who has done the job before may be asked to do it a second time.
The Daily Telegraph claims Liam Fox - who was defence secretary in 2010, under then Prime Minister David Cameron - is a "leading candidate" for the job.