Due to a delayed flight today I have about 45mins to make a connection on to the evening BA flight to LHR at OTP instead of the 3 hours I had planned for.

I’m arriving on a domestic flight and traveling with hand luggage only.

Will I have to re-clear security / is it possible I could still make the flight? Or is there a transfer area / passport control post-security? The flights are on separate bookings. Thanks!