Found this offer while ordering my 12 piece toyko blue dinner set for only £2.13 at asda online.
Active Mature Chicken 1KG only £1
Active Mature Ocean Fish 1KG only £1
Adult Lamb 1KG only £2.50
There some other bargains offers on the iams range. I bought the same iams from tesco online last week for about £6.50 on a bogof offer.
Forgot to mention this maybe just a local/regional offer. I am in the leeds/bradford area. Hope this helps. - whyme