The U1 serves Telephone House bus stop (a mere 3-minute walk from Mettricks Old Town) until about 20:30, when the U6 takes over. The U6 then runs until about 23:30. Both routes pass through Portswood; the U6 then serves Shirley and the U1 Swaythling. The U2 serves Mayflower Halls (20 minutes away from Mettricks by foot) and, in the other direction, Bassett Green. A single Unilink fare is £2, while a Day Pass is £3.50. Many BlueStar buses also stop in town; see the BlueStar map to see all its routes and the fare guide for ticket prices.
Mettricks Old Town is easily accessible from Southampton Central Station. You can take a 20-minute walk through West Quay and straight down the high street, or you can use the Quayconnect (a £1 single fare) or U1C buses, which leave the station regularly and serve Telephone House bus stop until about 20:30.
From Highfield Campus
The easiest way to travel to the old town from Highfield is by Unilink bus. From Highfield specifically, the U1C leaves the interchange at 17:52 (arrives 18:22), 18:04 (18:34), 18:18 (18:48), and 18:33 (19:03). Returning in that direction, the U6H leaves at 20:37 (arrives 21:06), 21:37 (22:06), and 22:37 (23:06). The U2C leaves Glen Eyre and arrives at Mayflower Halls (a 20-minute walk from Mettricks) every 20 minutes throughout the evening and returns with a similar frequency.