Thanks for all the advice!!! I might try a different bottle as he did seem to find the shape odd in his mouth. I'll also get mum to give it a test run. She's not too worried, she'll cope regardless (she's awesome that way )

It should be only 1 or 2 feeds (at the most) he'll miss so I'm not worried about engorgement, it takes 12+ hours for that now. My mum can technically bring him too me, but she'd have to get DS1 out of bed too and it would take nearly an hour for me to drive home, feed and drive back so not worth it iykwim.