They expanded the line-up later that year with the addition of Adam Williams (bass guitar) and Craig Brown (drums).

[1] The band self-released a demo cassette tape in 2014, following this in 2016 with a project which involved writing, recording and releasing a new song online every month throughout the year.

All twelve songs formed a full-length vinyl collection entitled Keepsake which was released in March 2017 by London based independent record label, I Can & I Will and digitally by AWAL.

Heavy Heart appeared live at 2015's CMJ Music Marathon in New York City, also performing at MBC Fest in Valencia, Spain and Truck Festival in Oxford, UK.

Their music was described by NME as "a graceful and rewarding listen"[2] and by The Line of Best Fit as "lush alt-rock",[3] whilst The Revue included the band in their Artists to Watch in 2017 feature, saying they had "an intoxicating rock formula with a 90s slant".