This white paper collates results comparing the performance of the two DVB-T modes currently in use in the UK. Namely, 64 QAM rate 2/3 and 16 QAM rate 3/4, both using 2K carriers with a 7 microsecond guard interval. Three different sources of impairment are measured: Co-channel interference from an analogue PAL signal, multipath propagation resulting in one echo inside or outside the guard interval and impulsive interference. Results are presented in a novel manner as 'noise bucket ' plots. These plots are used to quantify the improvement in performance that can be achieved with 16 QAM rate 3/4 over 64 QAM rate 2/3.