Andy wrote:

Easiest way is to goto the ticket office at an LUL railway station
(i.e. not Wimbledon) and ask for the zone 3-5 season to be upgraded to
a zone 3-6. You will pay the difference in price between an annual 3-5
and an annual 3-6, scaled according to how many days remain on the
original season. This will also be cheaper than adding zone 5-6 as an
extra. You could always do this with the paper tickets too. I'll be
moving myself in the near future, from Zone 2 to Zone 5 and made sure
that I can upgrade simply on my Oyster, the information coming from
the ticket office at Warren Street.

NB: A changeover has to be done by the location that originally issued
the ticket. Though it MAY be possible to get one at ANY LU Ticket Office
if you bought it from there.

An example:

Annual Zone 3-5 £776
Annual Zone 3-6 £928

Difference £152

So, if you have 6 months left on the first annual, you pay £76 for a
zone 3-6 ending on the same day as you original. This is documented
somewhere on the LT website, but I can't immediately find it, but the
following appears on the national rail website (http://
http://www.nationalrail.co.uk/times_...ditions.html):


Not quite. The amounts are all worked out pro rata, as an Annual is
priced at 40x the 7 day rate.

I wrote up a "Changeovers for Dummies" once, to make life easier for my
colleagues, but I've no longer got the original, alas.

Here's a walkthrough for this example. I'll assume the ticket was bought
after the January fares change, to make life easier, and there was no
Passenger Charter discount and no "lost days" added.

We'll also assume that the Original Ticket is valid from 16th February
007 to 15th February 2008, as it makes calculations easier.

New Ticket starts on 16th August 2007 and expires on 15th February 2008,
for a total of 184 days.

The original ticket cost £776 and an Annual for Zones 3 to 6 would have
been £928.

The "Base Rate" for the original ticket is £776 / 365 days, which is
£2.13 per day (rounded to the nearest penny), and the base rate for the
new ticket is £928 / 365 days, which is £2.54 (rounded to the nearest
penny).

The credit for the original ticket, therefore, is £2.13 x 184 days,
which is £391.92.

The price of the new ticket is £2.54 x 184 days, which is £467.36.

Therefore, the additional amount to be paid for the changeover is
£467.36 - £391.92, which is £75.44.

HTH,

Barry