My Tier Points collection year ends on march 8th. On the same date I am bound to fly a short hop Gatwick to Venice on an HBO fare.

I am now offered an upgrade to CE for £89.

Considering I have a bag to check, which would cost me £30, the real upgrade cost is £59.

I need to decide whether spending the extra £59 would be worth it.

The two questions I want to ask are:

1) TP year ends on March 8th, TPs for this flight (which is exactly on March 8th) will go into the old or new year? new year would be better for me

2) Generally speaking would you pay the £59 for this short flight?

I also need to consider this is a flight that I booked after registering for the triple avios offer. So I assume the number of miles earned would increase?

Suggestions?