A wireless communications device for transmitting or receiving data via a wireless communications network, the wireless communications device comprising transmitter circuitry configured to transmit radio signals via a wireless access interface to an infrastructure equipment forming a radio network part of the wireless communications network, receiver circuitry configured to receive radio signals transmitted from the infrastructure equipment via the wireless access interface, and controller circuitry configured to control the transmitter circuitry and the receiver circuitry to transmit data carried by the radio signals to the infrastructure equipment and to receive data carried by the radio signals from the infrastructure equipment, the controller circuitry being configured with the receiver circuitry to detect a plurality of synchronisation signal blocks (304, 322) transmitted by the infrastructure equipment (101, 210) via the wireless access interface, each synchronisation signal block (304, 322) comprising one or more first Orthogonal Frequency Division Multiplexed, OFDM, symbols carrying a primary synchronisation signal, one or more second OFDM symbols carrying a secondary synchronisation signal and one or more third OFDM symbols carrying information of a physical broadcast channel of the wireless access interface, each of the OFDM symbols of the synchronisation block being formed by a plurality of frequency domain sub-carrier signals each being transmitted over the duration of the OFDM symbol as a resource element of the wireless access interface, each OFDM symbol of the synchronisation signal block having the same sub-carrier spacing, and each of the third OFDM symbols being arranged to include demodulation reference symbols, each synchronisation signal block (304, 322) being transmitted through one beam of a plurality of beams, each beam being formed using a plurality of antennas, and an antenna weight vector used to form each beam is the same for the first OFDM symbols, the second OFDM symbols and the third OFDM symbols, to decode each of the detected synchronisation signal blocks to recover a synchronisation signal block time index representing a cardinal number of the detected synchronisation signal block, each cardinal number being associated with a beam of the plurality of beams used to transmit the detected synchronisation signal blocks (304, 322), and to determine, based on the recovered synchronisation signal block time index, which of the beams was used to transmit the each of the detected synchronisation signal blocks (304, 322), wherein one or more least significant bits of the synchronisation signal block time index is indicated by a relative order within the detected synchronisation signal block (304, 322) of the first OFDM symbols and the second OFDM symbols. transmitter circuitry configured to transmit radio signals via a wireless access interface to an infrastructure equipment forming a radio network part of the wireless communications network, receiver circuitry configured to receive radio signals transmitted from the infrastructure equipment via the wireless access interface, and controller circuitry configured to control the transmitter circuitry and the receiver circuitry to transmit data carried by the radio signals to the infrastructure equipment and to receive data carried by the radio signals from the infrastructure equipment, the controller circuitry being configured with the receiver circuitry to detect a plurality of synchronisation signal blocks (304, 322) transmitted by the infrastructure equipment (101, 210) via the wireless access interface, each synchronisation signal block (304, 322) comprising one or more first Orthogonal Frequency Division Multiplexed, OFDM, symbols carrying a primary synchronisation signal, one or more second OFDM symbols carrying a secondary synchronisation signal and one or more third OFDM symbols carrying information of a physical broadcast channel of the wireless access interface, each of the OFDM symbols of the synchronisation block being formed by a plurality of frequency domain sub-carrier signals each being transmitted over the duration of the OFDM symbol as a resource element of the wireless access interface, each OFDM symbol of the synchronisation signal block having the same sub-carrier spacing, and each of the third OFDM symbols being arranged to include demodulation reference symbols, each synchronisation signal block (304, 322) being transmitted through one beam of a plurality of beams, each beam being formed using a plurality of antennas, and an antenna weight vector used to form each beam is the same for the first OFDM symbols, the second OFDM symbols and the third OFDM symbols, to decode each of the detected synchronisation signal blocks to recover a synchronisation signal block time index representing a cardinal number of the detected synchronisation signal block, each cardinal number being associated with a beam of the plurality of beams used to transmit the detected synchronisation signal blocks (304, 322), and to determine, based on the recovered synchronisation signal block time index, which of the beams was used to transmit the each of the detected synchronisation signal blocks (304, 322), wherein one or more least significant bits of the synchronisation signal block time index is indicated by a relative order within the detected synchronisation signal block (304, 322) of the first OFDM symbols and the second OFDM symbols.