There is a mix of new items; some items previously sold; and some items from previous sales that went unsold, now listed with lower estimates.
For the Sixth Doctor it’s an item previously sold at a Bonhams auction some 25 years ago!
As usual I have separated the items by Doctor era, and you can see the rest of the items here:
Here are just the lots relating to the Sixth Doctor era
Doctor Who: Revelation Of The Daleks, 1985: Mortuary Attendant costumes,
comprising five pairs of light blue or green cotton trousers and six tunics, with eight light blue vinyl belts, one tunic with embroidered black chain-link insignia, as seen onscreen worn by various cast members, several tunics and trousers labelled Garroulds of London, some inscribed DW in ballpoint, various sizes
Purchased at a Bonhams auction in 1991 (lot 82).
Estimate £500 - 700