The Queen's Speech is a constitutional requirement. Theresa May needs to postpone it until some sort of deal is reached.

The Guardian reports the Queen's Speech Being Held Up.

Theresa May is scrambling to find legislation to keep MPs busy over the summer so that she can delay a potentially fatal Queen's Speech until the autumn.

The parliamentary session is already on course to be the longest in postwar history but the prime minister lacks the authority to start a new term.

Passing a Queen's speech is a minimum constitutional requirement of a viable government. Cabinet sources admit that the bill that implements Brexit is the last significant piece of legislation in the locker. Mrs May dare not introduce it, however, as she fears that it will be rejected by MPs, forcing her to end the session.

Instead, Downing Street has drawn up a list of relatively benign legislation to justify extending the session beyond the original two-year deadline due in June. It includes bills to change the tax treatment of sporting testimonials and increase the maximum sentences for cases of animal cruelty. Others under consideration in No 10 include measures to address domestic abuse and increase tenants' rights.

Speculation Becomes Reality

Guardian speculation that Theresa May might delay the Queen's Speech is now a reality, as noted above.

To fill in some details, consider this speculative story written April 17: Theresa May Could Put Off Queen's Speech Amid Brexit Turmoil.

May had been widely expected to schedule a Queen's speech setting out the government's legislative agenda within weeks, because she announced a two-year parliamentary session in mid-June 2017.

However, some within the government believe May is prepared to ignore demands for a programme of new laws, even though parliament has run out of business to discuss apart from Brexit legislation, which is currently stalled.