Although there is an Intelligence Committee in the House of Commons which tries to deal with these matters, it is highly unlikely that anything significant by way of actual intelligence would ever be discussed in what is in effect an open court for all the world to know and see.
A very difficult area indeed.
The SIS [Secret Intelligence Service] of UK is in many ways a law unto itself. It must [for the most part] be allowed to operate freely and without let or hinderance from politicians who may not know what they were reading, even if they were given [unlikely] access to a daily summary of gathered intelligence.
The vast majority of intelligence comes from electronic sources; radio intercept, wire tapping, bugging etc. Most of this is best described as gobbledegook - coded junk which has to be sifted through in the hope that a magic 'word' may appear in a text somewhere.
No group of people, not even a committee of MPs in the House of Commons, could ever totally come to grips with the amount of intelligence gathered on a daily basis from the electronic sources. This must be deal with by monster computers.
The SIS is divided into 'sections' such as MI5 and MI6 and others. None of these 'sections' is allowed to know in total what any other section is doing, not exactly anyway.
In the 1960s I was employed by an SIS section called MI8 - Signals Intelligence. Our job was to intercept radio transmissions, bug phones and bug just about anything else to hand. The entire taxi fleet in East Berlin was bugged, so that Red Army Officers, the most usual passenger, could be bugged while riding around in the taxi with a pretty girl who may have been a fully paid up member of MI someone or other. A great deal of 'pillow talk' intelligence was gathered in this manner. I have no doubt 'they' were doing the same to us. Who knows.
The 'spy game' is incredibly complex. Not for the feint hearted, full of gangsters, pimps and God knows who else.