WW1 Solent tower filmed by drone
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Nab Tower lighthouse: WW1 Solent tower filmed by drone

The BBC has gained exclusive access to film a former military tower which marks the entrance to The Solent shipping channel.

Nab Tower was built to protect the south coast from enemy submarines during World War One but was never deployed.

Now a lighthouse, the tower, four miles off the Isle of Wight, has been filmed by drone for the first time.

The steel and concrete cylinder was built in 1918 at a cost of £1m and sunk in position 1920, having been in Shoreham since the end of the war.

Measuring 90ft-high (27m) and 40ft-wide (12m), it was due to be one of eight but was the only one to be completed.