"Bletchley Park have defeated most encryption since Enigma and Code Purple. I would be surprised if they cannot crack any encryption in time."
Bletchley Park was active during WWII and for a while afterwards, but it's been a a museum since 1993 - no decrypting activities have taken place there for a very long time.
Nobody has - so far - succeeded in breaking end to end (E2E) encryption technology. Not even the companies using it can read messages that pass through their servers because they don't have the encryption keys - they simply cannot decrypt messages, and neither can anyone else. Only the recipients can do that.
The current government has been worried about this for a number of years, and very recently it was announced that if re-elected the Conservatives intend to introduce urgent legislation to force social media companies to hand over decrypted data to security agencies when called upon to do so.
This would mean that the likes of WhatsApp and Telegram would have to abandon end to end encryption in order to comply.
If you want to learn more about E2E and the problems associated with getting at encrypted data, you might want to get yourself comfortable and settle in to plough through this
It identifies the problems facing security agencies faced with E2E.