Stu, I will hopefully be on a fishing boat soon to complete a long awaited review of several kits. For PSK units most people overlook a gaff hook.Tthis is merely a large hook secured to a short stick ( a small nail through the eye, a small channel scribed with a knife or awl, some wrapped wire or string and your set). The assembly is to help land fish as they are being retrieved. Your best bet in G.B. is to visit a tackle shop and talk to fishermen. Like any pursuit, you can rapidly get lost in a maze of terminollogy and local use. What a fly fisherman in a scottish stream and a north sea cod fisherman use is decidedly different. A most usefull item ( though often illegal for normal use) is a gill net.