In the order the guy points at them:

.303 inch Rifle Short Magazine Lee-Enfield No 1 Mark III.

Most likely a .303 inch Rifle No. 3, also known as Pattern '14 (there's a slim chance it's a .300 inch U.S.A. Model '17, also known as Pattern '17, or U.S Rifle, Caliber .30, Model of 1917, but only if they've made an error in getting one that doesn't have a 2" wide red band painted near the muzzle).

A worn out .303 inch Rifle Short Magazine Lee-Enfield No 1 Mark III converted into a grenade launching rifle, most frequently called an EY Rifle. It's strengthened with copper wire and has an EY grenade discharger cup attached, in which you could put different grenades such as the Grenade, Hand, No. 36 "Mills' Bomb" (fitted with a gas check, as seen just next to it) or Grenade, Rifle, Anti-Tank, No. 68.

.303 inch Rifle No. 4 (Mark I).

.303 inch Rifle No. 5 (Mark I).

Two PIAT's, or Projector, Infantry, Anti-Tank.

Two Mk 2 Stens, or rather 9 mm Carbine, Machine, STEN, Mk II.

A Mk 2 Suppressed Sten, or rather 9 mm Carbine, Machine, STEN, Mk IIS (Suppressed).

Between the PIAT's and Stens, a Smatchet fighting knife/short sword.

Three versions of the .380 inch Revolver No. 2 Enfield, presumably Mk I, Mk I' and Mk I'' (replace ' with asterisks) – it's hard to tell for certain at the angle provided.

Three Webley revolvers, hard to tell which Mark and calibre from this angle.

A Browning Hi-Power, Inglis manufacture. Originally adopted in Belgium as the Modele 1935 Pistolet Automatique Grand Puissance, in British nomenclature something along the lines of Pistol, Browning, FN, 9 mm, HP. Number and mark is hard to tell.

The pistol he's holding is a U.S. Pistol, Caliber .45, Automatic, M1911, British nomenclature being .450 inch (or possibly .455 inch) Colt Automatic Pistol.

A couple of Very pistols, meaning flare guns. Exact models unknown.

And finally, a .303 inch Bren Light Machine Gun, Mk. I or III.