Webber, who lives in Sussex, denied 24 counts including fraud, obtaining a money transfer by deception and obtaining property by deception, but was yesterday convicted on all but one count - making a false representation.
Remanding Webber into custody, Judge Anthony Niblett said she would face a "substantial custodial sentence" as he described her as a "very dishonest woman".
The judge told her: "You have been convicted by the unaminous verdicts of the jury on clear evidence of serious offences of dishonesty involving deceiving the public purse and the taxpayer of around £350,000 over a period of some 10 years."
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Friday's forecast for the west of the region from Martin Stew.
Martin Stew has the latest weather forecast for the east of the region.
Martin Stew has the lunchtime forecast for the west of the ITV Meridian region.