Could Britain trap German ships inside the Kiel Canal?

What happens if Britain blocks the Kiel Canal while German squadrons are passing through it?

Careful timing could trap ships that lack room to turn, while explosive- and mine-packed blockships would make clearing the obstruction slow and dangerous.

The canal's confined dimensions create a severe risk for any squadron already committed to transit. Ships caught behind a new obstruction cannot simply turn around as a fleet and leave. They would need to reverse out or clear the blockage under intense time pressure. British blockships could carry mines and additional explosives, making any approach or attempt to dismantle them more dangerous. German guns might eventually blast a passage, but the delay could let the Royal Navy secure its Baltic position or defeat forces already on the eastern side. A well-timed obstruction could have an effect far beyond the number of British ships used to create it.