The best Axis 1/32s I have found are as follows:
Revell - cheap as chips but not necessarily particularly accurate or best fitting:
Arado 196 is their best kit in this scale
Junkers 88 (the rerelease with bombs is best) is OK but here are some build and mold quality issues. If you like a biggie then this is it.
Hasegawa do a good FW190 and you should be able to pick one up for your budget. Likewise their Stuka is a good one, better than the Trumpeter.
Eduard and Dragon have excellent Bf109Es, better than
Revell's G if you can get them. They should come in around your budget.
If you can put together just a little bit more than £50 then you can have a real treat with the best Zero model you can get for £56 delivery paid for
http://www.amazon.co.uk/
Tamiya-60317-Model-Aeroplane-Self-Assembly/dp/B000FJ4NIG/ref=sr_1_2?ie=UTF8&qid=1458735171&sr=8-2&keywords=
tamiya+1/32
Here is a review:
http://www.largescaleplanes.com/reviews/review.php?rid=937 and
http://
tamiya.com/english/products/60318zero52/index.htm
Make no mistake the
Tamiya 1/32 WW2 series of kits are the best models that you can get of their subjects but the Zero is the only Axis kit in their series. If ever you want to spread your wings away from Axis and to allied aircraft and are willing to invest more than £50 then the other Tammies in the series include three Spitfire versions, two Mustang versions, two Corsair versions and a superb Mossie. the Mossie will set you back about £130 and the others around £100 each but they are worth every penny. The best you can buy.