A receiver for receiving and recovering local service data symbols from first Orthogonal Frequency Division Multiplexed, OFDM, symbols in the presence of second OFDM symbols, the first and the second OFDM symbols including a plurality of sub-carrier symbols formed in the frequency domain when transmitted on the same carrier frequency in a single frequency network, the second OFDM symbols carrying national broadcast data symbols and modulated on to the sub-carriers of the second OFDM symbols using a first modulation scheme to form national broadcast modulation symbols, and the first OFDM symbols carrying the national broadcast data symbols and the local service data symbols and modulated on to the sub-carriers of the first OFDM symbols using a second modulation scheme, the first and the second OFDM symbols both including the same pilot sub-camier symbols and the first OFDM symbols including local pilot symbols, the receiver comprising a tuner (175, 158) which is arranged in operation to detect a radio frequency signal representing a combination of the first and the second OFDM symbols and to form a received base band signal representing the combined first and second OFDM symbols, an OFDM detector which is arranged in operation to recover modulation symbols carrying the local service data symbols from the data bearing sub-carriers of the first OFDM symbols, and to generate an estimate of the local service data symbols from the modulation symbols carrying the local service data symbols, wherein the OFDM detector includes an equaliser (320, 402) for recovering the local service data symbols of the second modulation scheme by generating an estimate of a combined channel ( [H n (z) + H l (z)]) via which the first and second OFDM symbols have passed using the pilot sub-carrier symbols of the first and second OFDM symbols; generating an estimate of the national broadcast modulation symbols from the modulated data bearing sub-carriers of the first modulation scheme from the second OFDM symbols ( Ŝ (z)); generating an estimate of a convolution of the combined channel and the national broadcast modulation symbols ( Ŝ ( z)[ H n ( z) + H l ( z)]); generating an estimate of a component of the received base band signal representing the local service modulation symbols of the first OFDM symbols by subtracting from the received signal the generated estimate of the national broadcast modulation symbols convolved with the estimate of the combined channel ( D z H l z ≈ R z − S ^ z H n z + H l z); generating an estimate of a channel via which the first OFDM symbols were received using the local pilot symbols (Ĥ l ( z)); generating an estimate of local service data symbols from a combination of the estimate of the component of the received signal representing the modulation symbols carrying the local service data and the estimate of the channel via which the first OFDM symbols were received D ̃ z ≈ R z − S ^ z H n z + H l z H ^ l z by either dividing the estimate of the component of the received signal representing the local service data symbols by the estimate of the local channel to recover an estimate of each of the modulation symbols carrying the local service data symbols from the first OFDM symbol, and de-mapping the modulation symbols carrying the local service data symbols to generate the estimate of the local service data symbols, or calculating a log likelihood ratio for each of the local service data symbols from the estimate of the component of the received signal representing the modulation symbols carrying the local service data symbols and the estimate of the local channel to recover an estimate of each of the local service data symbols from the first OFDM symbol, and estimating the local service data symbols from the log likelihood calculations.