For UK users: I'm surprised the BBC are hijacking the back button here when redirecting from .com -> .co.uk. I thought that behaviour was reserved for more, well, scummy websites.

This appears to be the offending client-side code:

  let {isUkCombined: t} = e;
  const n = new URL(Object(c.a)())
  , {protocol: a, host: r, pathname: o} = n;
  if (Object(m.b)(),
  t && r.includes(".com")) {
    const e = r.replace(".com", ".co.uk");
    window.location.assign("".concat(a,"//").concat(e).concat(o))
 } else if (!t && n.host.includes(".co.uk")) {
    const e = n.host.replace(".co.uk", ".com");
   window.location.assign("".concat(a, "//").concat(e).concat(o))
 }

Anyone work there / know someone that works there and could fix?

Replacing "window.location.assign(...)", with "location.href = ..." should do it.