Positioning of Bird Feeder

I'm wanting to put some bird feeders in my garden but I'm really not sure where the best place to put them is, or even if it's a good idea. At present we get mainly pigeons, the occasional magpie and the odd blackbird and robin here and there, but I'd like to increase the diversity. The biggest problem is that our estate is cat central. Including our own, there are at least 6 cats that frequent our garden. I'm not sure there's anywhere in my garden that birds would feel safe enough to feed. The trees were only planted last year, the plums and greengage definitely don't have any branches that could take any weight but some of the lower ones of the hawthorn might be OK. I've posted a couple of photos and would appreciate any suggestions.
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Mine is in the 'shrubbery' so the birds can queue up but my brother's is in the middle of nowhere!
Mine
and my brother's
He gets a wide variety of visitors and has 2 or 3 cats that visit so BobTheGardener's suggestions sounds a good one.
We have about 5 or 6 cats which regularly walk through or stay for a snooze in the sun in our garden but I don’t think it has any effect on the number of birds visiting given the numbers.
East facing, top of a hill clay-loam, cultivated for centuries (7 years by me). Birmingham
Becoming very suspicious now.
I live in west central Scotland - not where that photo is...
I see that more people have flagged the post I was responding to, and it's been removed as spam.
I live in west central Scotland - not where that photo is...
When the spam is removed these comments remain, and can look very unfriendly out of the context of the spam!