The following pipechar was run from Glasgow to SLAC by Alan Flavell on march 29, 2001.

I have to confess to having no previous experience with the 'pipechar'
tool, but I quickly downloaded it in order to get some comparison
figures.  My only option from here that offers 100M access is to run
it on a linux system (there seem to be some reservations in its web
page about that...?)

If this is to be believed, it seems I already hit a ~ 46M limit at the
access to the local MAN.  Beyond that there would appear to be
congestion at the connection between the JANET backbone and its US
links.

This is just one shot to SLAC.  Other attempts produced somewhat
variable results in some places, but seemed consistent in reporting a
bottleneck between the backbone and the US-GW.

(comments continue below)

PipeCharacter statistics: 94.62% reliable
From localhost:
|       95.364 Mbps 100BT (101.2273 Mbps)

1:                                 (194.36.1.1  )
|
|       156.392 Mbps             <4.7919% BW used>
2:                                 (130.209.2.1 )
|
|       157.347 Mbps             <3.9092% BW used>
3:                                 (130.209.2.22)
|
|       46.243 Mbps              <19.3096% BW used>
4: scot-pop-west.ja.net            (146.97.250.33)
|
|       46.156 Mbps              <19.3096% BW used>
5: glasgow-bar.ja.net              (146.97.37.25)
|
|       46.342 Mbps              <12.6573% BW used>
6: pos9-0.glas-scr.ja.net          (146.97.35.53)
|
|       47.184 Mbps              <3.1499% BW used>
7: pos0-0.edin-scr.ja.net          (146.97.33.22)
|
|       46.466 Mbps              <10.7655% BW used>
8: pos0-0.leed-scr.ja.net          (146.97.33.26)
|
|       45.515 Mbps              <6.2556% BW used>
9: pos2-0.lond-scr.ja.net          (146.97.33.30)
|
|       23.130 Mbps    !!! ??? congested bottleneck <49.0932% BW used>
10: london-bar1.ja.net              (146.97.35.2 )
|
|       46.682 Mbps    !!!       <40.8208% BW used>
11: us-gw.ja.net                    (128.86.1.96 )
|
|       46.995 Mbps              <13.7693% BW used>
12: ny-pop.ja.net                   (193.62.157.10)
|
|       46.355 Mbps              <11.2344% BW used>
13: ny-pop.esnet.ja.net             (193.62.157.6)
|
|       44.452 Mbps        ??? congested bottleneck <3.3232% BW used>
14: snv-nyc.es.net                  (134.55.205.21)
|       56.075 Mbps 100BT (101.4167 Mbps)