God bless this forum's Wiki and all who contribute.
In the past, I doubt I would have considered doing such an easy/complicated (you choose) necessary bit of maintainence. I would have paid someone else instead.
Now armed with the appropriate & excellent bit of Wiki info, and photos for the spannerphobics, I did it. WELL CHUFFED, ME!

I followed the removal to the letter and all came apart with ease. However I had been spraying WD40 on all concerned bits for over two weeks.
I altered the method for pushing in new bushes, though. I had big problems getting the bush to initially bite on the edge of the wishbone. Everthing was now covered in copperslip. I was sweating like a horse. And the combination made holding, banging, gripping near impossible.
Take 5 and think.



So instead of whacking with a BF hammer I pressed them in using a vice, a square piece of 5mm alloy and 4" piece of standard scaffold pole.
just line it all up between the jaws of your vice.
Then assemble thus.
Outer jaw
Alloy plate
New bush with shed loads of copperslip spread all over the gaff.
Wishbone
3-4" scaffold bit
Inner jaw.
Align all horizontally & centrally as possible between the jaws of your vice and turn her in.
Dadada Laaaaa. Straight in ....nooooo problemo!
Tomorrow, I'm doing off side and will photo procedure.
Oh! and one more tip. Remember to refit the two odd shaped washers when assembling.

Thanks