https://preview.mailerlite.com/f1w3e1/1522495799294957436/b0g1/
They are free and include
How to tune the LHIRES III (Tricky as owners will know)
A live session with the LISA (The BAA has one available for loan to suitable applicants)
and an intriguing one (just in French unfortunately) on Exoplanet spectro-photometry using a Star Analyser
Cheers
Robin