I'm in Manchester too (hello!) and also have a static IP.
$traceroute
www.manchester.ac.uk
traceroute to mhn.mc.man.ac.uk (130.88.98.244), 64 hops max, 52 byte packets
1 firewall.manchester.<snipped-my-domain>.co.uk (192.168.34.254) 2.752 ms 0.963 ms 1.230 ms
2 141.0.<snip>.bcube.co.uk (141.0.<snip>) 4.639 ms 5.623 ms 4.277 ms
3 172.16.23.106 (172.16.23.106) 2.531 ms 2.274 ms 2.188 ms
4 172.16.30.164 (172.16.30.164) 3.833 ms 16.692 ms 15.493 ms
5 172.16.17.81 (172.16.17.81) 1.829 ms 1.698 ms 1.683 ms
6 * * *
7 ae22.manckh-sbr1.ja.net (146.97.35.189) 8.174 ms 7.046 ms 8.773 ms
8 ae23.mancrh-rbr1.ja.net (146.97.38.42) 6.942 ms 6.867 ms 6.851 ms
9 ae31.mancwh-rbr1.ja.net (146.97.78.34) 7.286 ms 7.446 ms 7.310 ms
10 universityofmanchester.ja.net (146.97.169.6) 7.235 ms 7.413 ms 7.250 ms
11 130.88.249.185 (130.88.249.185) 7.641 ms 7.715 ms 7.577 ms
12 gw-jh.cnw.its.manchester.ac.uk (130.88.249.178) 7.843 ms 8.080 ms 7.949 ms
Looks to be Manchester all the way for that; prior to CGNat the pings were a lot lower - where now the ping for the final hop is 7.8msec, it used to be perhaps 1.5-2msec instead.
There's a fair bit which should still use IX Manchester - there are quite a few big companies peering there (BBC, Apple).