Writ of Acceleration

I've found this type of writ by looking up the Marquess of Salisbury on
Wikipedia. I saw on this page :

ury

that he was created Baron Cecil by Writ of Acceleration...what does that
mean. Is that a Life Peer?

Don Aitken...

No, it was quite different. What he got in 1999 was a life peerage. A
writ of acceleration (or, more correctly, writ *in* acceleration) is a
procedure whereby the heir to a hereditary peerage could be summoned
to the House of Lords during the lifetime of, and in place of, the
actual holder of the title. All modern uses of it, I think, have been
in cases where a peer held more than one title; in this case the 6th
Marquess of Salisbury continued to be summoned as such, while his son
was treated as if the holder of the barony. It is not *that* unusual;
his grandfather was summoned in the same way in the 1930s.

Since the issue of a writ of summons has, since 1999, created no right
to sit in the House, writs in acceleration are obsolete.

Michael Rhodes...

Wasn't he first summoned to the House of Lords in the his father's
Barony of Cecil of Essenddon, circa 1992 (during John Major's
premiership), and then given a life peerage in 1999 ?

(Gary Holtzman) garyholtzman...

It means that he succeeded to one of his father's lesser peerages during his father's
lifetime. This enabled him to sit in the House of Lords, back in the days when one could
do so by virtue of inheriting a barony.