No idea why some customers are perpetually challenged with ReCaptcha and other not but what is clear is that Google wants “one's pound of flesh” and Virgin Media are happy to oblige to avoid expense of fixing weakness in their single sign in process.
Use an email client instead of webmail to avoid the ReCaptcha challenges. If you must use webmail then try the audio challenge instead () if it is an appropriate option for you; usually correct identification of single word is sufficient to pass the challenge.
OT: Hills and chimneys, sounds like Google's project Maven is back on
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