1. Please can you confirm, grouped by month, how many stage 1 complaints were received by the council in the calendar year to date.
The complaint data we hold is for financial quarter periods (3-month blocks) rather than individual months. The table below includes the data we have available to date:

Stage 1 complaints
2021-22 Quarter 2 (July to September 2021): 41
2021-22 Quarter 3 (October to December 2021): 38
2021-22 Quarter 4 (January to March 2022): 48
2022-23 Quarter 1 (April to June 2022): 64

2. Of those, how many were responded to within the 15-day timescale.
We do not hold this data.

I have checked your published data page and it shows no complaint data at all from the link.
We will review the webpages where there are links to complaints data and ensure they are active.