Faux Suede Leggings: Topshop £25, Boots: Zara £49.99, Cardigan: Zara £25.99, Whistle Necklace: Urban Outfitters £10 (sale item), Jumper: Next £16, Ring: Miss Selfridge £6, Watch: Urban Outfitters £24
Best Buy: From this selection the best buy is definitely the jumper from Next. At £16 I think this is an absolute bargain! It's very soft to wear and looks great with my current favourite colour, navy. It's quite difficult to see from this image but it has flecks of white/cream/brown all over it which I think makes it slightly more exciting than a plain coloured one. If you are looking to update your wardrobe with this season's popular camel colour this is a great item. It is also avaliable in an alternative colour, grey, and can be found in both the regular and petite sections. If you click the link below you can see the speckled effect in more detail!
Although I decided on the jumper as the best buy, I have been very impressed with Zara recently too. The green cardigan is very reasonably priced at £25.99 and it is also available in camel (an alternative to the jumper for adding this colour to your collection). This season they have had some really lovely items and their colour palette is spot on for autumn. The boots pictured above (from the TRF range) are also a great find, they're so comfortable and pretty much look good with any outfit, whilst keeping your feet warm and protected from the bad weather of course! Although they cost a little more they should (hopefully!) wear well and last through autumn/winter, and are cheaper than a lot of other real leather boots I've seen in the shops.
Edit: since posting this I have had to return the Topshop leggings as they had a hole in them where the tag was, which is very disappointing. However, Marks & Spencer are selling a similar style for the same price which are available in black, grey (sale item) and a camel tone.