Experienced seamstress needed for buttonholes on jersey dresses

I’m looking for an experienced seamstress/tailor to professionally sew buttonholes onto jersey/stretch fabric dresses.

The dresses are already fully made, I only need the buttonholes added. As the fabric is stretchy, I need someone experienced in working with jersey/knit fabrics who can produce neat, secure, professional-looking buttonholes without stretching or damaging the fabric.

Ideally London-based so I can drop off/collect the garments.

Please let me know your price per buttonhole (or per dress), your experience with stretch fabrics, and turnaround time.