The Central Bank of Sri Lanka Annual report for 2014 Part02 Sec 5.2(a) states

Denominations Rs 20, 50 and 100 with No change in 2010-01-01 date on the issue, or any Press release. I have reported this in my webpage
http://notes.lakdiva.org/cbsl/2010lkdpd/

And give the Serial numbers for each denomination with and without varnish in individual pages linked from it like
http://notes.lakdiva.org/cbsl/2010lkdpd/2010_lkdpd_20r.html

I'm not sure if SCWPM has listed it as a variety. These web pages are trilingual like the Ceylon and Sri Lanka Currency Notes. They are part of a website I have developedover last year with about 200 web pages documenting with images of about 300 types of Ceylon and Sri Lanka currency notes since 1785 which also include a complete set of UV imagesthe most beautiful of which are posted at
http://notes.lakdiva.org/uvbest_lk.html

The Ceylon Currency website particularly on the Currency from 1785 to 1885 goes beyond what has been published in SCWPM and by Owen Linzmayer. The notes issued by Private Banksbetween 1844 and 1884 are considered as Specialized issues, when they were the only currency of Ceylon between 1856 and 1884.

To visit Kavan's web site, see:
http://notes.lakdiva.org/

To read the earlier E-Sylum article, see:
INDIA CONSIDERS VARNISHED BANKNOTES (http://www.coinbooks.org/v21/esylum_v21n36a38.html)