Lord Beaumont currently properly refers only to the Duke of Norfolk

Duke of Norfolk

The Duke of Norfolk is the premier duke in the peerage of England, and also, as Earl of Arundel, the premier earl. The Duke of Norfolk is, moreover, the Earl Marshal and hereditary Marshal of England. The seat of the Duke of Norfolk is Arundel Castle in Sussex, although the title refers to the...

 as holder of the English

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 Barony of Beaumont

Baron Beaumont

The title of Baron Beaumont is an ancient one in the Peerage of England, created in 1309 for a younger part of the de Brienne-family. The sixth Baron Beaumont was created Viscount Beaumont in 1432; after the death of the 2nd Viscount both titles fell into abeyance...

 (created by writ in 1309). However, in a historical context, it can refer either to a past holder of that Barony or to a holder of one of the extinct Viscountcies of Beaumont:

• Viscount Beaumont (Peerage of England
  Peerage of England
  The Peerage of England comprises all peerages created in the Kingdom of England before the Act of Union in 1707. In that year, the Peerages of England and Scotland were replaced by one Peerage of Great Britain....
  
   - created 1432, extinct 1507)
• Viscount Beaumont, of Swords in the County of Dublin (Peerage of Ireland
  Peerage of Ireland
  The Peerage of Ireland is the term used for those titles of nobility created by the English and later British monarchs of Ireland in their capacity as Lord or King of Ireland. The creation of such titles came to an end in the 19th century. The ranks of the Irish peerage are Duke, Marquess, Earl,...
  
   - created 1622, extinct 1702)

It is sometimes improperly used to describe Timothy Beaumont, Baron Beaumont of Whitley

Timothy Beaumont, Baron Beaumont of Whitley

Timothy Wentworth Beaumont, Baron Beaumont of Whitley was a United Kingdom politician and an Anglican clergyman. He was politically active, successively, in the Liberal Party, the Liberal Democrats and the Green Party...

, a life peer

Life peer

In the United Kingdom, life peers are appointed members of the Peerage whose titles cannot be inherited. Nowadays life peerages, always of baronial rank, are created under the Life Peerages Act 1958 and entitle the holders to seats in the House of Lords, presuming they meet qualifications such as...

, who is properly described only as Lord Beaumont of Whitley.