I understand the intention is to provide extra time for Private Members' Business. That is not the effect of the motion even if it is carried. I refer you to Standing Order 82 which deals with Private Members' Business and provides as follows:
The Order Paper shall be confined to Questions, Private business and Government business on Thursdays. On Tuesdays and Wednesdays, Government business or Private business, as the case may be, shall be interrupted between 6 p.m. and 7.30 p.m. to take private members' business: Provided that a member of the Government may move, without notice, at the commencement of public business on any Tuesday or Wednesday that, on that day or during the period specified in the motion, specified Government business, or Private business, as the case may be, shall not be interrupted if under consideration at the time fixed for taking private members' business. Such motion shall be decided without amendment.
The effect of that Standing Order is that Private Members' Business must be taken on Tuesdays and Wednesdays between 7 p.m. and 8.30 p.m. unless at the commencement of public business the Government moves in accordance with the provisions of the Standing Order.