What is the best P.S.U for my build?

[Devon_4]

i have a budget of £50 for a P.S.U I can not go over by a penny this is my build:

i5 6500
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sapphire r9 380 4gb
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asock z170 atx pro4s
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corsair vengance 1600mhz ddr4
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corsair carbide spec-01

 

[g-unit1111]

Something like this: http://www.scan.co.uk/products/620w-seasonic-s12ii-620-ss-620gb-non-modular-80-plus-bronze-1x120mm-fan-atx-psu

Couldn't find anything cheaper that was of decent quality.