I'm looking to upgrade to a dslr camera and i'm looking for suggestions?

At the moment i'm using a 18mp polaroid ie4038 bridge camera but i'm looking to upgrade to a dslr i have been looking at the nikon d3300 and the d5200 the MAX i'm looking to spend is £600 but i would like to get a decent camera for a decent price any suggestions?

You can get a D5300 here inside your budget
http://www.wexphotographic.com/buy-nikon-d5300-digital-slr-with-18-55mm-vr-ii-lens-black/p1548798

There's a Canon 700D as well (bargain price because 750D has launched)
http://www.wexphotographic.com/buy-nikon-d5300-digital-slr-with-18-55mm-vr-ii-lens-black/p1548798

Pentax K50 is good… Weather sealed.

Or a Sony A58 with 2 lenses. (Has electronic viewfinder)

You need to visit a camera store and pick the one you like. Can't go wrong.

WEX Photographic sometimes drops the ball and often gets it right.
https://www.trustpilot.com/review/www.wexphotographic.com

Suggest you go to a camera shop, try products and buy it there.

You have chosen two excellent cameras, be sure to get the kit lens and then start saving for your next lens. Also suggest you look at Canon and Pentax cameras, they are also excellent.

Find a dealer and explore all the options.

Pentax will give you weather-sealng, a pentaprism viewfinder, and the ability to meter with legacy lenses at that price.

Nikon will give you the usual hassle (will this lens give autofocus with my camera? Will this lens meter with my camera?) but their cameras are adequate.

Canon don't take their old manual focus lenses, but there are no compatibility problems between autofocus and digital lenses. Canon's in-house sensors are a little behind the Sony sensors used by everyone else, but the difference isn't really noticeable.

Sony's SLTs (2-digit numbers) aren't true DSLRs, but they have the edge in video shooting.

Look at All the alternatives in your price-bracket, and choose the camera that feels best in your hands.

You can safely buy any DSLR camera, because nobody makes any bad ones.

There are only three manufacturers who make DSLRs at your budget, those are Canon, Nikon, and Pentax. You simply can't go wrong, but the one you want.

Here is a mid-level dSLR priced like an entry-level.

http://www.bhphotovideo.com/...amera.html

You'll have to decide what features are the most useful and therefore the most important to you. I'm not a fan of the entry-level D3xxx series by Nikon. Nikon's D5xxx and D7xxx are among the better DSLRs on the market, especially the D7100 and D7200.
Canon has unfortunately gotten behind in sensor technology over the past few years. Fortunately, they've caught up with the T6 and 70D Mark II.
Pentax has the K50 (best in class IMHO) and the new K3 II is being reviewed as one of the best APS-C format DSLRs on the market. Both have in-body image stabilization allowing for lower ISOs which means better image quality. Because the IS is in the body, you can stabilize any lens for the Pentax. Canon and Nikon offer a large number of stabilized lenses, but not all. The 50mm is a prime lens that no one makes a stabilized version of. The amazing light gathering capability of the 50mm along with in-body IS makes for an incredible low-light camera setup. However, if you're mostly into landscape, then you'll probably have your camera a tripod a lot and won't use the IS anyway. Unless, that is, you don't want to have to deal with lugging a tripod everywhere. Then the in-body IS is very useful up to 2-4 stops lower ISO or slower shutter speeds.
If you need a camera that can focus on moving objects, then you should stick with a DSLR. If not, then a mirrorless camera will do you just as well as a full-size DSLR. Just food for thought…

Here's a good comparison of a some of the better cameras on the market: http://www.dpreview.com/...ikon_d5300