RI
If you read the original question then you would have noticed that LWT and Channel are excluded. Channel would probably be a very popular choice so long as one is aware that it exists. After all the Channel Islands are not officially part of the UK whereas Ulster is. LWT could make Thames stand out because of the weekday weekend split. If ITV has absorbed LWT then it can't own Thames.
TV AM could have been another popular choice because it already was national and it ran parallel with the other ITV companies by having its own dedicated time slot.
TV AM could have been another popular choice because it already was national and it ran parallel with the other ITV companies by having its own dedicated time slot.