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Good point, ianess. Up to a few years ago "assistng with inquiries" was common.
Now, with the help of the meeja [sic], the tabloid point of view is that if you are arrested, then you are obviously guilty.
Especially if you are in the public eye, (MP / footballer / "celebrity" etc.), and inolved in a rape / child abuse offense. Similarly, if you are a Muslim, then any arrest on a 'terrorism' charge, then according to the tabloids, then you must be guilty.
Of course, there are exceptions - all Britons tried and convicted in a foreign court, are, according to the tabloids, obviously innocent.
Of course, the police are happy to arrest anyone and everyone these days, rather than asking them to "help with their inquiries", since it means they can then take fingerprint, blood and/or DNA samples on the flimsiest of suspicions and the the minorest of arrestable offences. This is so they can complete their genetic database 9of the entire UK as soon as they can.