JD Airport Cars are upstairs at 234a, High St, between Clothing Care Dry Cleaners and HT Pawnbrokers.
They usually have a folding sign at the entrance to make them easier to spot, advertising rates to take people to various airports for their holidays. Generally, though, they are a minicab company.
They are not hard to find, but in any case will probably see you first, as they have cctv enabling them to see people in the street outside as well as those coming up stairs to their offices. They share the entrance with a hair and beauty salon, Selina Debrah (UK), though above the stairs it still says it is called Silhouette Unisex Salon.
Tel: 020 8503 6161, 0208 503 6230.