This is the most important UK data this week. We also have UK employment report on Wednesday, so Sterling is the main character on the stage next two days. I think the data most likely is flat or worse is ngegative.
GBPUSD seems lost momentum at 1.5400 I show on the chart.
If data is negative, G/U could back 1.5200 in the near term.
However, !.5400 is a strong resistance only a strong data could trigger a move above this level.