Depends on the kit you order. Mark can trim the armour for you at an extra charge, or it will come untrimed.
Things you will need for higher level approvals: Rubber S trim, inner drop boxes, darker lens material, rubber gloves, latex or rubber hand guards , Centurion approvable rivet kit ( Echo, here on the boards can supply the rivets)
Various elastic widths for strapping. You will need to decide on which strapping method suits you. Thermal detonator clips, also available here or make your own.
TK boots, or buy black boots and colour them... Sorry, I have assumed you didn't know any of this,I will no go on, but if you think there is anything else you my need or have a question on, other will chime in I'm sure.