Bikes on trains in the UK

Stupid as I am, I am endeavouring to travel to Windermere on Avanti West Coast next week.

Having patiently waited for their reduced timetables to be published and bookable, I bought a ticket and used their online form to try and reserve a bike space.

Got this back in an email:

Thank you for contacting Avanti West Coast to request a bike reservation on one of our services.

Due to strike disruption, reduced timetables and suspending ticket sales, we are unable to make bike reservations until 11/09/2022, as these will most likely not be honoured. I apologise for the inconvenience caused. Please speak to our station or onboard teams for further assistance on your day of travel.

WTF does that mean?