TTT, sorry to disappoint you but the Parliament Acts cannot be invoked and this explains why,
"46. Following the 2017 General Election, the Conservative government decided to extend the first session of the new parliament to two years, rather than the usual 12 months.
This was to allow both Houses time to consider the legislation necessary to carry out Britain’s withdrawal from the EU.
It is understandable that the government decided that it needed an extended session to pass the European Union (Withdrawal) Bill; however, this means that the Parliament Acts cannot be used to ensure the passage of that Bill or other Brexit-related legislation before the expected deadline for the negotiations in March 2019.
47. Erskine May states:
it is provided that a bill which is passed by the House of Commons in two successive sessions (whether of the same Parliament or not), and which, having been sent up to the House of Lords at least one month before the end of the session, is rejected by the House of Lords in each of those sessions, shall, on its rejection for the second time by the House of Lords, unless the House of Commons direct to the contrary, be presented to Her Majesty and become an Act of Parliament on the Royal Assent being signified to it.
One year must elapse between the second reading of the bill in the House of Commons in the first of these sessions and its passing in the House of Commons in the second session.
As the current session has been extended beyond the expected deadline for Article 50 exit negotiations the Parliament Acts cannot be used by the government as there will only be one, rather than the necessary two sessions.
However, it is unclear what effect, if any, the announcement of a two-year ‘transitional’ period may have, if the Withdrawal Bill is delayed by the House of Lords."