Can't see any obvious technical grounds, so a basic challenge will have to do:
Dear City of Bradford Metropolitan District Council,
I am challenging PCNs BQ95001402 and BQ95005287. Both PCNs were issued in under a minute on the same road, and I have not been able to locate any evidence of any signage, nor is any shown in any of the videos or photographs on the council website.
If you are not willing to cancel both penalties, I would ask that you at least cancel one of them and then allow me to pay the other at the 50% rate.
Yours faithfully,
If you send a single letter in the post, there's a chance they might only consider it as a representation against one of them, which then amounts to a procedural impropriety of failing to consider the representation against the other one, so this is one of the rare cases where I'll suggest a letter in the post would be best. But make sure to keep a copy, and get a certificate of postage from the post office (don't send it recorded delivery, a certificate of posting is free).