Got these from the www.perkz.com website:
10% off Amazing Days Out - perkz
25% off Centreparks - PPPZ
15% off BCP. Call 0870 013 4535, and quote PERKZ
25% off RAC. New members call - 0800 581 077 and quote GE0344. Existing RAC members call - 08705 722 722 and quote GE0344.
15% off plus first 20 prints free at Truprint - perk6.
£15 tickets to visit any Tussauds Group Attraction in May, telephone 0870 220 4000 and quote "Perkz".
10% off LXDirect - XX276.
10% off ELC - PKZ.
5% discount on all online orders over £200 at PCWorld - PERKZAPR.
10% off IWOOT - PERKZ10.
£10 off a £50 spend at John Lewis - PE850PCH945
10% off Partybox - PRKZ10
10% off Dorothy Perkins - PERKZ10.
5% off Debenhams - PVCP
15% off Joe Browns - MAR616
4-5% off Love2shop vouchers - pe657z
10% extra free tokens at Theatre Tokens - Perkz
30% off at Charles Tyrwhitt - click here
10% off Figleaves - click here
10% off Pharmacy2U - PKZ1, PKZ2, PKZ3 etc
15% off Cotswold Outdoor - EWPK
10% off Sport-E - XX609
£5 off Interflora - perky10
10% off Hotel Chocolat - Perk99
Plus, there are some other direct discounts which I haven't included. Hope they help somebody.