Matching numeric substring in a URL to flag

Question

Been scorching the net and stack overflow content for the past week, tried everything ik but can't find my error

I want to flag these URLs (in Pyspark) as Brand

1. https://aaa.com/en-GB/GB/c10092.html
2. https://aaa.com/en-GB/GB/c10040-p0.html
3. https://aaa.aaa.com/en-GB/GB/p/100713

The fixed pattern I saw here was that after "/c" and "p/" there were at least 3 digits and wrote this

f1 = df1.withColumn("Flag", when((col("uni_referer").rlike("%https://aaa.aaa.com/en-GB/GB/p/\d{3}%")),'Brand'))

But it's not flagging, can someone please help? Thanks