This ensures that, among other things, if the retailer that sold you the goods no longer exists, you can simply deal with the manufacturer (or local distributor) of the goods.
No. Your contract is with the seller, not the manufacturer. Any warranty offered by the manufacturer continues to exist but that is separate to your statutory rights.
OTOH once a company is in administration any subsequent transactions are underwritten by the administrator. You have reasonable legal protection now buying from Maplin: enhanced customer-service terms such as buyer's remorse provisions may well no longer apply but your statutory rights are watertight. Oddly enough, now they are in administration they'll have no problems getting credit insurance as a consequence.
The difficulty arises for a transaction that occurred before administration but there is an issue to be addressed afterwards: in that case all bets are off.