I don't have the times north of Taunton (yet) but presumably the convoy will pass through Bristol.
From South West Rail Gen:
55019, 20096, 20905 heading for the South Devon Railway Diesel Gala
0Z55 1158 Barrow Hill to Totnes 20:11
Taunton 18:37
Tiverton Parkway 1849
Cowley Bridge 1902
Exeter St Davids 1904
Dawlish Warren 1913
Newton Abbot 1923 1953
Totnes 2011
Deltic and two 20's - Fri 10th June
Perhaps not! Think it's Freightliner 47-hauled though 
10/6/05 FO 0Z47 09:15 Crewe BH to Barrow Hill arr 11:21.
0Z55 12:06 Barrow Hill to Totnes SDR.
47+55019+20xxx+?????,
12:23 Chesterfield,
12:55 Derby,
13:25 Tamworth HL,
13:53 Landor St,
14:05 Tyseley,
14:42 Leam Spa,
15:03/05 Banbury,
15:33 Oxford,
15:42 Didcot N,
15:57 RDG W Jcn,
16:36/48 Newbury,
17:48 Fairwood Jcn,
18:37 Taunton,
19:04 Exeter SD,
19:13 Dawlish Warren,
19:22 Newton Abbot,
19:38 Totnes.
13/6/05 MO 0Z55 10:00 Totnes to Barrow Hill.
10:13 Newton Abbot,
10:24 Dawlish Warren,
10:35 Exeter SD,
11:05 Taunton,
12:00 Fairwood Jcn,
12:36 Newbury,
12:53 RDG W Jcn,
13:11/30 Didcot N,
13:41 Oxford,
14:10/18 Banbury,
14:41/48 Leam Spa,
15:12 TS,
15:25 Landor St,
15:42 Tamworth HL,
16:31 Derby,
16:54 Chesterfield,
17:05 BH.
10/6/05 FO 0Z47 09:15 Crewe BH to Barrow Hill arr 11:21.
0Z55 12:06 Barrow Hill to Totnes SDR.
47+55019+20xxx+?????,
12:23 Chesterfield,
12:55 Derby,
13:25 Tamworth HL,
13:53 Landor St,
14:05 Tyseley,
14:42 Leam Spa,
15:03/05 Banbury,
15:33 Oxford,
15:42 Didcot N,
15:57 RDG W Jcn,
16:36/48 Newbury,
17:48 Fairwood Jcn,
18:37 Taunton,
19:04 Exeter SD,
19:13 Dawlish Warren,
19:22 Newton Abbot,
19:38 Totnes.
13/6/05 MO 0Z55 10:00 Totnes to Barrow Hill.
10:13 Newton Abbot,
10:24 Dawlish Warren,
10:35 Exeter SD,
11:05 Taunton,
12:00 Fairwood Jcn,
12:36 Newbury,
12:53 RDG W Jcn,
13:11/30 Didcot N,
13:41 Oxford,
14:10/18 Banbury,
14:41/48 Leam Spa,
15:12 TS,
15:25 Landor St,
15:42 Tamworth HL,
16:31 Derby,
16:54 Chesterfield,
17:05 BH.