With thanks to all on the forum who have contributed to this topic, by using a combination of everyone's methods I managed to get the rear suspension 'blind pin' removed. And a good thing I did too as it was just starting to corrode away merrily as it nested tightly in the frame lug.
I eventually got a suitable 10mm rawl bolt from B & Q, but couldn't get one long enough to use as a puller. So I tightened it up really well inside the pin and then applied some gentle heat to the left side lug (no need to heat the right hand side one as the pin doesn't enter it).
After getting the lug reasonably hot I used a screwdriver as a drift to tap the pin out from the right hand side of the bike. By using a screw driver I was able to carefully only tap the bolt of the rawl bolt and not the sleeve, and thus the more I tapped the tighter it became lodged inside the pin.
I kept up a combination of heat and tapping, heat and tapping, ever conscious of the horror stories of breaking off the frame lug, and eventually out it came.
The pin was a bit corroded, but by far the worst was the one at the top of the dog bones.
Here are a few pictures of the job in progress.
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The pin starting to corrode.
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The rawl bolt came out without trouble
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The top dog bone bolt was the worst corroded.
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The stupid design means the pin doesn't locate into the right hand lug at all!
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Job done!
Edited by Riggers, 28 October 2016 - 05:42 pm.