GrumpyGregry
Here for rides.
My LBS (ive only tried one) doesn't have a spanner that will - fit. (he also says he only uses baby lotion on his brookes at £1.70 for morrisons own brand).
My small mole wrench can get in and has just about managed to turn the nut a 1/2 rotation.
When I press firmly with my thumb (almost as firmly as I can but not quite), i'd say I can depress the centre hole of the three about a cm, and the 'wings' on each side of the saddle flare about a cm. As a rough guide, is this about right, or should there be very very little movement?
Please... leave off with the mole grips... keep them at lest 3m away from your bike at all times. Nasty nasty things.
Your tension ; it would sound more than a little slacker than any of my brooks saddles, of which I currently have four btw. So somewhere in the shed there are a couple of spare saddle spanners..... Sounds to me like your saddle may have got soaked* at some point or the previous owned didn't have a brooks shaped arse and slackened it off a bit to see if a hammock was more comfortable than a plank.
if I can find do you want one for the price of postage?
NB Not all Brooks need a spanner, the superior Ti railled ones use an allen key for tensioning iirc.
*contrary to popular myth this is not the end of the world. a tennis ball and a ball of string and an airing cupboard are all you need to restore a soaked brooks.