Not the first time...
...that WMP have performed this particular trick. My dad was arrested once, on Easter weekend in or around 2005.
The cops had nabbed someone in Staines for something or other, took the guy's name, DoB and address and let him go. Come his day in court, he didn't show up. The address he'd given turned out to be false. So they looked up the name and DoB in the Dept of Work & Pensions database (which they shouldn't have done, and ignoring that he'd lied once already) and came up with my dad. Then issued a warrant for his arrest. Because they'd knocked on my dad's door on Raster weekend, they were going to hold him until the next working day (tues) because "he'd already skipped bail once".
Eventually, the duty sargeant released him on common sense grounds, but advised he don't leave town for a few days.
Ironically, the police in Staines had a photo of their actual suspect, but never thought to send it with the warrant.
An absolute shit-show, start to finish