[homesecurity]

Spot on diagnosis from Paul and SnoopZ regarding the 93Mbps ceiling. Coming from the cabling and network diagnostics side, here is the exact physical reality of what is happening between your Hub 3, the Archer C60, and your cables:

1. The 93.10 Mbps 'Fast Ethernet' Ceiling:
The TP-Link Archer C60 is marketed as an "AC1350" wireless router, but TP-Link built it with 10/100 Fast Ethernet physical ports on both the WAN and LAN interfaces to keep production costs down.
On a 100BASE-TX connection, the maximum theoretical payload speed after Ethernet framing, IP headers, and TCP window overhead is roughly 94.92 Mbps. Your test result of 93.10 Mbps is literally wire-speed perfection for a 100Mbps port. No matter how much bandwidth Virgin Media delivers to your Hub 3, that physical Ethernet link between the Hub and the C60 cannot physically pass a single byte above ~94Mbps.

2. The Cat 5 vs Cat 5e Cable Reality:
To clear up the cable point: 100BASE-TX only uses two twisted pairs (pins 1, 2, 3, and 6). 1000BASE-T (Gigabit) requires all four pairs (pins 1 through 8).
Even original 1990s Cat 5 (rated to 100MHz) will happily negotiate full Gigabit over short domestic patch lead distances (under 15-20m) provided all 4 pairs are properly punched and unbroken. However, if any 8-pin patch lead has a broken core on pins 4, 5, 7, or 8, the Gigabit NIC will automatically drop down to 100Mbps. Testing with a known good Cat5e or Cat6 patch cord is always good practice, but in your specific setup, the Archer C60’s physical 100M PHY chip is the definite bottleneck.

3. Ditching the C60 vs Keeping Modem Mode:
If you are happy with the speed and it covers what you and your wife need for browsing and 720p streaming, there's obviously zero urgent need to spend money. But if you do want the 370Mbps you are already paying for:
- Route A (Free): Take the Hub 3 out of Modem Mode and use it as your main router. The Hub 3 has Gigabit LAN ports and its 3x3 5GHz AC Wi-Fi will easily deliver 300-350Mbps over Wi-Fi within line of sight. (Just note the Hub 3 uses the Intel Puma 6 chipset, which can introduce small latency spikes if anyone in the house does competitive online gaming, though for video streaming it's unnoticeable).
- Route B (Keep Modem Mode): If you prefer the security, custom DNS, or Wi-Fi control of a 3rd party router, keep the Hub 3 in Modem Mode and replace the C60 with any budget router with Gigabit WAN/LAN ports (like a TP-Link Archer C6 v3 or AX12 for around £30-£35). That will instantly unblock the full 370Mbps download across your whole house.