fact needing checkin

what is the current rate of interest that the customs and excise folk charge on their debts? for example on an outstanding penalty for misdeclaring VAT? the latest figure I can come up with is 6.5% but that's for 6.11.01.

here's a rundown:

Period Rate % Authority
1.4.90–5.11.90 13.00 SI 1990/523
6.11.90–5.3.91 12.25 SI 1990/2113
6.3.91–5.5.91 11.50 SI 1991/348
6.5.91–5.7.91 10.75 SI 1991/1078
6.7.91–5.10.91 10.00 SI 1991/1472
6.10.91–5.11.92 9.25 SI 1991/2195
6.11.92–5.12.92 7.75 SI 1992/2745
6.12.92–5.3.93 7.00 SI 1992/3015
6.3.93–5.1.94 6.25 SI 1993/421
6.1.94–5.10.94 5.50 SI 1993/3168
6.10.94–5.3.95 6.25 SI 1994/2542
6.3.95–5.2.96 7.00 SI 1995/521
6.2.96–31.3.97 6.25 SI 1996/165
1.4.97–5.7.98 6.25 SI 1997/1016
6.7.98–5.1.99 9.5 SI 1998/1461
6.1.99–5.3.99 8.5 Press Notice 31/98
6.3.99–5.2.00 7.5 Press Notice 7/99
6.2.00–5.5.01 8.5 Press Notice 6/00
6.5.01–5.11.01 7.5 Business Brief 7/01
6.11.01 6.5 Business Brief 15/01