Derek,
I had a look at something similar last week, was a Red 80 / 20 carpet and the patch was about 2ft x 5 nearly a full 5 litres had gone everywhere and had been in nearly a week the insurance company told them to get somebody to have a look at it, I said on the phone its probably permanent now but i will have a look for you either way its going to cost you £60.00. Went to have a look was a right mess so just charged them £60 for a report to send the insurance.
Paul