Small crack in aluminium frame - repairable?

I have an Orange Evo2 LTD edition that I've had from new for years.
Today I noticed a small crack in a rear stay
It doesn't go all the way round, only about halfway and it's a pretty small crack. I'd like to repair it if possible as it was the first bike I was ever able to buy new, worked my a** off to pay for it and we've ridden thousands of miles together.
Is it repairable? Where would I start looking to find someone who could repair it properly (I'm based in Southern part of UK).
Today I noticed a small crack in a rear stay

It doesn't go all the way round, only about halfway and it's a pretty small crack. I'd like to repair it if possible as it was the first bike I was ever able to buy new, worked my a** off to pay for it and we've ridden thousands of miles together.
Is it repairable? Where would I start looking to find someone who could repair it properly (I'm based in Southern part of UK).
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Boardman FS Pro 2016. Whyte PRST 4 2004, Whyte JW 4 2004
Up to you - but maybe time for n+1
Either buy another frame or bin the frame.