"Stop Gull" - anyone used these?

I use the anti - bird spikes you can get from B and Q. You get a whole strip of them for £32 They are s/s and a bit longer, but easily trimmed to your preferred length. They do work!
 
My headsail will sweep across the radar, so I need to avoid sharp things. At the price these are probably worth a go, on offer as 5 for £20. Four for the radar and one for the tricolour at the masthead.
 
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