A public dispute has erupted within the UK Labour Party concerning the increase in defense spending, with Defense Secretary Wes Streeting directly confronting Tanmanjeet Singh Dhesi, the chairman of the Commons Defence Committee.

Streeting labeled Dhesi's criticism of Chancellor John Healey's financial plans for the military as "unfair" and "completely unfounded." Dhesi had previously stated that crucial decisions regarding defense spending aimed at enhancing the UK's military capabilities had been "lamentably delayed" until a new spending review scheduled for the following year. He warned that such delays risk leaving the nation "seriously vulnerable" in the event of a major conflict.

Streeting asserted in the House of Commons that the government has already enacted measures leading to the fastest increase in defense spending since the Cold War, emphasizing that these increases are already in effect, not just projected for future years. He acknowledged Dhesi as a "good friend" but maintained his stance, stating, "I will gladly accept criticism where I think it's fair, but I will robustly reject it where I think it is wrong."

Earlier in the week, Dhesi had welcomed the Chancellor's funding for the Defence Investment Plan but expressed a desire to see a clear pathway outlined for defense spending to reach 3 percent, and eventually 3.5 percent, of GDP. He noted that key decisions had been postponed, arguing that "investment in our nation's defence and security cannot be kicked into the long grass" as adversaries are not constrained by fiscal cycles. Dhesi also highlighted the public's support for Ukraine, welcoming the announcement of continued aid.

The exchange drew criticism from the Conservative Party. Tory shadow defense secretary James Cartlidge deemed Streeting's remarks "wholly inappropriate" and "totally disrespectful." Cartlidge questioned the source of funding for the 3 percent defense spending target, noting that Healey himself had previously raised concerns about the matter.