Hello, I am a solicitor with 20 years experience. I will try to answer this for you.
Unless there is some reason why admitting this as evidence would make the reial unfair then it can be admitted. The loss of the rest of the conversation is unlikely to be a good enough reason on it's own.
sorry there was a mistype reial should be trial
It is important but you can give evidence about the true screenshot history. It would be a different matter if the police had lost the conversation.
I am sorry but my replies keep not getting sent to you.
That situation is different then and if your lawyer can argue teat the self appointed investigators have been deceitful than it may well be possible to exclude the evidence. What stage is the case at? Do you have a solicitor?
OK so quite an early stage. If yo do no have one yet get a solcitor now.
There isn't much that can be done at this stage issues of admissibility will be dealt with later by the Judge either a trial or on pre-trial hearings.
The CPS decide not the police.