How do you remove the radio from a 1.6 1998 Vauxhall Astra?

remove the four grub screws(allen headed),when removed you will need two tools which you can make from 2 or 3 m/m round wire,bend in a u shape to slot into holes left by grub screws.when slotted in push each tool outwards pulling gently towards you.you may have to jiggle it,radio wiil slowly come out.ther is multi connecter on back of radio plus aeriel cable,detach both