5,040 Spliced Surprise Royal (4 methods)

Robert D S Brown
23456    M  W  H  Methods    
42356          -  aaaaaaaaa.
63254    -     -  d.dddddddd.
56234       -     cccccccc.c
23564       -  -  bbbbbbbb.b.
53462    -        a.aaaaaaaa
24365    -     -  b.bbbbbbbb.
32465          -  ccccccccc.
43265          -  ddddddddd.
52364    -     -  a.aaaaaaaa.
65324       -     bbbbbbbb.b
32654       -  -  dddddddd.d.
62453    -        a.aaaaaaaa
34256    -     -  c.cccccccc.
23456          -  ccccccccc. 

Contains 1440 London No.1(a), London No.3(c), 1080 London No.2(b), London No.4(d), with 12 changes of method, all the work.