Hello,
1) You need turn of PayPal in VehicleManager : Settings - Pay.
Set Show PayPal buy - No.
Available for PayPal currencies: AUD, CAD, CZK, DKK, EUR, HKD, HUF, JPY, NOK, NZD, PLN, SGD, SEK, CHF, USD ,RUB
'£' is not Available for PayPal.
2) Go to admin area - components - VehicleManager : Settings - Frontend Settings - Price Settings - Currency
and add replace USD with '£'
Follow attached image
3) Create new item with new Currency.
Thanks