Thankyou for your comments. You say £400 a head but I came out at less than £200. My thinking was twin squirrel at £1050 +vat for 1:30 ( 3 return trips from Battersea to Guards) Approx £700-£1000 landing fees gives a total around the £2500-£2800 mark, about £175 per person.
Any thoughts much appreciated ?