Peter song

I hope someone could give me clear guidance. I placed an order in Flannels online store from Netherlands and I collected it in the store in London. Unfortunately, I want to return the goods (approximately 1000Euro) now and I need to send the parcel to London from Amsterdam. I get the return label from Flannels and I will ask DPD to ship it. I would like to know whether I would pay customs duty and VAT for this returned goods in UK? Thanks in advance.