I'm with Roger.. I am not aware that VM has any duct covers actually sited in any road and being driven over (happy to be corrected)
They are all usually in the pavements with NTL, Telewest, Nynex... etc. stamped into them.
Your cover is the bog standard Pam InterA manhole cover used on manholes supplied for the utility companies, sewerage etc.
In any case a blue cross is a hopeful sign 🙂
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John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired, 1 WiFi, 1 on PA) Hub5 in modem mode with Apple Airport Extreme Router +2 Airport Express's. On 250Mbps, Talk Anytime Phone, x2 Mobile SIM only iPhones.