There's still a reasonable chance that the company will survive. There were several potential buyers lined up but none of them could finalise a deal before the deadline for the company going into administration. The administrators will now be talking to the firms who've shown interest in Wilko, in the hope that some (or even all) of their shops can be saved.
However one doesn't need to be an expert retail analyst to see where Wilko has been going wrong. I've driven to B&M this evening, on the edge of Ipswich, to buy some items that I could have also purchased in Wilko. (If they'd not been in stock, I could then have tried The Range and/or Dunelm, both of which are on the same retail park). To have used Wilko though
(a) I'd have had to have driven further (into Ipswich town centre) ;
(b) I'd have had to go before 6.30pm, when the Wilko store closes, rather than being able to shop until 8pm at any of its three rivals that I've mentioned ;
(c) if the items I'd wanted were out of stock, I wouldn't have had any alternative store close to hand (making me less likely to try Wilko in the first place) ; and
(d) I'd have had to pay £2.45 per hour to park in the nearest car park and then carry my purchases back to there (rather than being able to park outside the store, as I did at B&M).
While Wilko's doggedness in sticking primarily to town centre sites has benefited the relatively small number of people who still shop in town centres these days, their failure to move to edge-of-town retail parks has clearly cost them dearly.