Put the flour, eggs and breadcrumbs in separate flat containers. Remove any skin from the sole and trim the fillets to a nice finger shape. First, place the fish in the flour and coat evenly, then dip it in the egg and finally the breadcrumbs. Repeat this again so you have a thick coating on the fish. Heat the oil in a deep-fat fryer, deep saucepan or wok to 180C, or until a piece of breadcrumb sizzles straight away when dropped in. Fry the fillets for 2 mins until golden. Drain the fish on kitchen paper, season with salt and serve with a generous dollop of the smoked eel tartare sauce, lemon wedges for squeezing over and chips, peas or mushy peas, depending on preference.