The more I read the selection policy, the more I think people are worrying too much about the relays and the relay time.
I accept I could be wrong here, but for me the policy is pretty clear - if the top 4 collectively meet the time, they will go, no questions asked. That's even if Aquatics GB might not have chosen those specific swimmers themselves. Joe Litchfield is an example of that. He might not be their preferred candidate but he took the decision out of their hands.
The first paragraph after the relay selections says the following:
"Following the selection of athletes under 5.1, 5.2 and 5.3 additional nominations may be made at the complete discretion of the PD and the GB Head Coach. As well as other considerations, the PD and GB Head Coach may use performance against times listed in Table 1 as a guide to assist the exercise of their discretion. In the event the PD and GB Head Coach are unable to agree then the PD’s nomination decision shall be final."
There's nothing there that says they won't pick a relay team if they miss the time. There's just no guarantee that they will.
The women's 4x100m free missed the time at the British Champs in 21 and they still took part in Tokyo. The policy was slightly different in 21 so it's not exactly the same, but I think the result will be similar.
Hopefully the swimmers will take the decision out of the selectors hands anyway.
Personally, I will say this - if Jacob Whittle gets on the train, he's a lucky boy. He's had a pretty terrible week. Conversely, if Kieran Bird does not go, he's super unlucky.