Very attractive alternatives!
If I had to make the journey this week (SOU to BHM) I would probably elect to do so via Bristol, probably enjoying 3 + 2 seating for the first half of the journey. Split ticketing should help reduce the cost too.
But, seriously, last Thursday Lisa and I (
and around 2500 others) arrived into Southampton laden with luggage. In normal times,
SWR» provide services to London,
GWR▸ services to Bristol and South Wales, Southern to Brighton, and
XC▸ to Coventry, Birmingham, and Manchester with connections on to Sheffield, Leeds and Newcastle. Often, the platforms at SOU are sprinkled with people with heavy luggage with fancy colourful labels, headed home. Lots of Northerners, lots of Welsh.
* This was not just a flow last Thursday - in the winter, there are ships at least a couple of times every week, sometimes several on the same day, and for the rest of the year there are more - it's quite rare for there to be a day that there are no cruises arriving or leaving.
* Only a small proportion of cruise passengers use the train. Many drive, others use the cruise provided coaches, some take taxis over medium distances and some fly home. Train is probably 5th in the list ... but I do think it's underrated. Works well for us.