Not anthologies, but a short-lived series of science fiction novels issued by Nova, the publishers (at that time) of New Worlds and Science Fantasy magazines.
Stowaway To Mars by John Benyon (a.k.a. John Wyndham)
London: Nova Publications, 1953 trade-sized paperback;
original price: 1/6;
128 pages;
I.S.B.N.: none (“Nova Science Fiction Novels No. 1” on spine);
cover artist: Gordon Hutchings.
The Weapon Shops Of Isher (1951) by A.E. van Vogt
London: Nova Publications, 1954 mass-sized paperback;
original price: 2/-;
159 pages;
I.S.B.N.: none (code: NS 1);
cover artist: Gerard Quinn.
The City In The Sea (1951) by Wilson Tucker
London: Nova Publications, 1954 mass-sized paperback;
original price: 2/-;
154 pages;
I.S.B.N.: none (code: NS 2);
cover artist: Gerard Quinn.
The Dreaming Jewels (1950) by Theodore Sturgeon
London: Nova Publications, 1955 mass-sized paperback;
original price: 2/-;
156 pages;
I.S.B.N.: none (code: NS 3);
cover artist: Gerard Quinn.
Jack Of Eagles (1952) by James Blish
London: Nova Publications, 1955 mass-sized paperback;
original price: 2/-;
159 pages;
I.S.B.N.: none (code: NS 4);
cover artist: Gerard Quinn.