Communications network and methods with enhanced duplex

A method in a wireless terminal which communicates across a radio interface with a radio access network, the method comprising:

• receiving from the radio access network:
• slot format information comprising transmission direction configuration for each symbol in a slot for an uplink (UL) subband;
• validation information;
• using the validation information to perform validation or invalidation of the transmission direction configuration for at least a portion of the UL subband.

An access node of a radio access network which communicates with a wireless terminal over a radio interface, the access node comprising:

• transmitter circuitry configured to transmit to the wireless terminal:
• slot format information comprising transmission direction configuration for each symbol in a slot for an uplink (UL) subband;
• validation information;
• receiver circuitry configured to receive from the wireless terminal information transmitted in symbols of the uplink subband according to the validation information.