"Moles have a very high metabolic rate and need to eat 60 to 75% of their body weight in worms and grubs each day.
They eat and rest on roughly 4-hour cycles, 4 hours feeding then 4 hours resting. Moles are very territorial of their feeding areas and will fight off another mole; they are only tolerant of another during the breeding season.
So if you set your live catch trap, which is like a toilet roll tube with a flap at each end and check it 8 hours later you’ve possibly got a dead mole. It’s either died of starvation or stress at being held captive in the tube.
Even if you check the trap after 4 hrs and find a live mole, how long has it been there? And what do you do with it now?
If you think release it in a nice field, think again. It is an offence to relocate a pest onto another person's land without permission.
Is the mole is still strong enough to dig and find food?
Or if it finds another mole tunnel, is strong enough to fight off the current owner of this tunnel?
The abandonment of Animals Act 1960 section 1 makes it an offence to release an animal into the environment if it does not have a reasonable chance of survival."
Excerpt from t'internet on the matter