Born Amelius Wood, he was the eldest son of Lieutenant-General William Mark Wood and Amelia Jane, daughter of Sir Robert Williams, 9th Baronet. He was a descendant of Richard Lockwood, Member of Parliament for Hindon, the City of London and Worcester in the early 18th century, whose father Richard Lockwood had acquired the Lambourne estate in Essex through his marriage to Susanna Cutts.
He was educated at Eton.
Lockwood joined the Coldstream Guards in 1866 but retired from the Army in 1883 with the rank of lieutenant-colonel. He was appointed a Privy Counsellor and a Commander of the Royal Victorian Order in 1905, and raised to the peerage as Baron Lambourne, of Lambourne in the County of Essex, in 1917. From 1919 until his death he served as Lord Lieutenant of Essex.
In 1927 he was appointed a Knight Grand Cross of the Royal Victorian Order.
Lord Lambourne married Isabella, daughter of Sir John Milbanke, 8th Baronet, in 1876.
Lady Lambourne died in September 1923. Lord Lambourne survived her by five years and died in December 1928, aged 81, when the barony became extinct.
25th United Kingdom Parliament. 26th United Kingdom Parliament. 27th United Kingdom Parliament.
28th United Kingdom Parliament.
29th United Kingdom Parliament. 30th United Kingdom Parliament]
He sat as Conservative Member of Parliament for Epping from 1892 until 1917 and was also Provincial Grand Master of the Essex Freemasons from 1902, Vice President of the RSPCA, President of the Royal Horticultural Society and Chairman of the Governors of Chigwell School from 1893 to 1922.
