when i had my MOT done i had an advisory saying my brake load sensing valve linkage was seized. Im having a day today tampering with my golf and have had a look at it. i dont really know what exactly im suppossed to be looking at though, but here are some pics


apart from the slight leak im not sure whats supposed to be seized?
also it looks like something is prehaps missing from where my finger is pushing in the top picture? am i right or wrong?
any pointers/ advice/ critism or abuse would be helpful.
cheers J