I understood the RN/MoD did not think that it was a good move to have to dump such weapons systems as Storm Shadow, if it had not been safe or necessary to use the weapon, thinking that it weighs in at 2,700 lb, just about the total designed bring back weight for a VL.
VLBB is about 4-5000lb. Which covers most the short range stuff you may have to return
You are not going to change your mind about firing a cruise missile, it can be re-targeted in difficult to perceive probability that it becomes unsafe to do so in the hour after leaving the carrier.
Most of the reasons to bring it back would be mechanical issues with the F-35. So give a 10% turnback rate during the life time (10years?) of the 900 Storm Shadows in UK, 99 would have to be returned to ship by SRVL.
Assuming all are fired from the F-35 (they won't) and all have to be returned during a hot day (most/all will be at night).
SRVL is a very nice to have - its not an obstacle or disadvantage. It just about closes the gap with the F-35C which can bring back 9klb and its more than the F-18 (7klb?).