NB: Lauri is now facing three parallel extradition request to the USA as an indirect consequence of failure to comply with a court order to facilitate decryption.
This is not ideal, but will probably fail, hopefully with some precedent set.
Please help us build a picture of UK Internet Censorship by adding URLs to be tested, by helping develop new probes (browser extensions, an iPhone client etc etc) or just by spreading the word that https://Blocked.org.uk is available.
Please also see https://www.blocked.org.uk/faq which will explain the level of filtering enabled on some of the probes which will explain why some sites may appear blocked even if you, being on the same ISP, can reach said URL.
It would seem like some classification of the blocked URLs plus a suitable extension to use willing proxies would be quite useful as an exercise in making the blocklist completely pointless.
I'd imagine a lot of people that have issues with e.g. running a Tor node would be perfectly happy to offer up proxies offering up various subsets of the blocked sites whitelisted by category.
Have you considered setting a user agent other than Python Requests default? Probably not necessary, but good practice. Also, ironically, the app is not available on any of my devices.
Some people have failed to pass the test of "reasonable doubt" for s.53 (3) / (4) defenses e.g. ( http://www.alphr.com/news/361693/teenager-jailed-for-refusin... ) but in other cases they have succeeded (e.g. Lauri Love had his hdd's taken and the NCA couldn't decrypt them but had to release him on bail; http://www.bbc.co.uk/news/uk-england-suffolk-31544346 and subsequently returned some of the storage (before arresting him again))
There are also people out there working to help the reasonable doubt argument; https://brasshorncommunications.uk/projects/s53/