I don't usually write product reviews but despite Amazon taking this item off sale for some time due to faulty discs, they have put it back on sale and continue to sell a set plagued with picture faults.
On several episodes approx 40% of the screen has increased grain which the BBC is aware of, offering replacement discs in the post. Should it really fall to the consumer to have to replace these discs?
Bad form, 2|Entertain, BBC and Amazon for continuing to stock discs which are KNOWN to have problems. Recall them all and start afresh because the quality control on these discs is sadly lacking.