Our hotel is Holiday Inn Express Swiss Cottage. We're arriving at Gatwick on the 25th (leaving tomorrow which is why I need a quick answer) and then taking a first capital connect train to St. Pancras. We were hoping to take a taxi from there since there's four of us, two kids and two adults and three carry-on bags and one big bag with us. Would this be a good way to go, and if so, around how much should it cost and would it fit all of us? Any other suggestions on how to do this? Thank you so much in advance!