There are no TimeZone IDs for London or Paris (BST WET)

There are no TimeZone IDs for London or Paris (BST, WET).
There need to be two SimpleTimeZones that reflect
the Unix "GB"/"GB-Eire" and "WET" TZ settings.

Here is the time now:

% env TZ=GMT date
Wed Apr 29 01:20:15 GMT 1998
% env TZ=WET date
Wed Apr 29 02:20:23 WET DST 1998
% env TZ=GB date
Wed Apr 29 02:20:28 BST 1998


But look at what TimeZones are available:

[...]
BET (Apr 28 22:20 GMT-03:00) -180 minutes (-3 hours). USES DAYLIGHT IN STANDARD
CAT (Apr 29 24:20 GMT-01:00) -60 minutes (-1 hours). USES STANDARD ALWAYS
GMT (Apr 29 01:20 Greenwich Mean Time) 0 minutes (0 hours). USES STANDARD ALWAYS
UTC (Apr 29 01:20 GMT+00:00) 0 minutes (0 hours). USES STANDARD ALWAYS
ECT (Apr 29 03:20 Central European Daylight Time) 120 minutes (2 hours). USES DAYLIGHT IN DAYLIGHT
EET (Apr 29 04:20 GMT+03:00) 180 minutes (3 hours). USES DAYLIGHT IN DAYLIGHT
[...]

There are no TimeZones (even strangly named ones) that reflect
the correct behavior.