An off-duty PCSO had an ‘unknown sticky substance over her’ when out on a jog in broad daylight.

At around 10am on Thursday, July 15, the victim, aged in her 30s, was out jogging along the A418 Leighton Road when a white van pulled alongside her between the walk-through to Moorlands Road and the roundabout where Leighton Road meets Stewkley Road.

The passenger in the van made a derogatory comment towards the victim before throwing the substance at the PCSO.

In a faded white coloured van, the vehicle then drove away in the direction of Aylesbury.

The offender is described as a white man, aged in his late 20s and of skinny build with brown hair.

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The victim was not injured, but her clothing was damaged.

Investigating officer Detective Constable James Lacey, based at Aylesbury police station, said: “This was a completely unprovoked, mindless and disgraceful assault, which left the victim feeling distressed, as she did not know what the substance was.

“I am asking any members of the public who has witnessed this incident to please come forward to help our investigation.

“I am particularly keen to speak to anybody who has CCTV or dash-cam footage from the area at around the time of the assault.

“Although the victim was not injured, having an unknown liquid thrown at her was naturally very distressing.

“This incident happened on a busy stretch of the A418, and I am urging anybody who saw this or has dash-cam which may have captured registrations plates of any white vans coming in the direction of Milton Keynes from Aylesbury between 9.45am and 10.15am on Thursday to please come forward.

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If you know anything, please let the police know

“You can either contact the 24-hour non-emergency number 101, quoting reference number 43210314240, or make a report online.

“Alternatively, you call the independent charity Crimestoppers 100 per cent anonymously on 0800 555 111.

“Owners of any footage will not be required to attend the police station in person and can send footage via a secure link.

“Enquiries will be made with owners of all white vans using the A418 at that time, and so I would also urge the driver or passenger of the van, if you were involved in this incident and would like to resolve this, please contact police.”