Rent Avid Mbox pro audio interface multiple outputs/inputs for surround sound. in Stanmore (rent for £8.00 / day, £4.57 / week)
Sound Cards for High Fidelity Audio | Overclockers UK
USB Audio Codec for Jetson Nano, USB Sound Card, Driver-Free, Plug And Play - Unmanned Tech UK FPV Shop
Asmuse USB Audio Interface, 24Bit/196kHz Professional Sound Card, Audio Mixer with XLR/TSR/TS Ports for Guitarist, Vocalist, Podcaster or Producer (Red) : Amazon.co.uk: Musical Instruments & DJ