1. UK Link Technology Refresh
Annie Griffith
February 2008

2. Progress Since Last Update
Early interface routing changes implemented successfully
Completion of 3rd party security penetration testing at new Data Centres
Dress Rehearsal completed
4th trial migration
+ batch catch-up
Bulk Migration started
SAM completed, incremental updates being applied
INV in progress
File system migration – in progress

3. Cut-over and Implementation
Outage still planned at 4 days, 23rd-26th February
All Go/No-go points defined
Back-out points and processes defined
Error scenarios worked through and recovery actions understood
MOD proposal 184
approved at Mod Panel on 7th Feb, awaiting Ofgem decision,
includes:
2 partial non-business days for section G, M and S4 (25th & 26th Feb)
4 days relief from data logger liabilities (24th-27th Feb)

4. Cutover Approach Data cutover
Started on 1st Feb, 3 weeks in advance of main cutover, with BULK migration, followed by “delta” data updates
This will have no effect upon the operational service
Final cutover starts 22nd/23rd February 2008
REC invoice to be issued early on Friday 22nd – due dates will be unchanged
Other production runs on 22nd will be unchanged
Outage start time
Starts after Datalogger file issue on Saturday 23rd
Shippers should continue to send files as usual

5. System Impacts System Sat 23rd Feb Sun 24th Feb Mon 25th Feb
Tue 26th Feb
Wed 27th Feb
Thu 28th Feb
Conquest
Outage
Service resumes, data will match UK Link
Normal service
IAD
Will have data as 22nd
Data will be up to date (27th)
SP Transfer
No Run
Run 24th and 25th
Run 26th and 27th
Normal Service
Data Loggers
23rd Run
Run 24th and 25th

6. Decision Points SummaryID
Date
Input
Output G1
11th Jan
Interface Plans Agreed
Move to early interface implementation G2
22nd Jan
UAT and OAT Completed
Initiate Bulk Data Migration G3
01ST Feb
Dress Rehearsal completed, All plans in place
Start pre-cutover activities G4
21st Feb
All approvals in place
Approval to start G5
23rd Feb
Data loggers Complete
Start Outage G6
24th Feb 12:30
Migrations Completed
Desk top rollout and reconciliation checks G7
25th Feb 10:00
Data Rec. Completed
Release to internal users for screen verification G8
25th Feb 19:30
On Line Verification complete
Start batch catch up G9
26th Feb 09:00
Transfer Routes and data validated
Release to internal other systems
G10
26th Feb 10:00
Files generated and verified
Release to Shippers
G11
26th Feb 12:00
Batch catch-up progress OK
Enable peripheral applications

7. Implementation Communications
Specific updates around the implementation will be ed to the standard distribution lists
UKLC
Operational Shipper Contacts
Planned Comms
w/c 18th Feb – Outage reminder notices issued
Monday 25th – notice on progress over weekend
Tuesday 26th – notice on catch-up progress
Wednesday 27th – further notice on catch-up (if reqd.)
In case back-out required
Will send out notice over weekend or at earliest opportunity

8. Next Steps Final pre Go-live Shipper communications
Complete Bulk migration activities and other pre-implementation work
Go-live Cutover