Travelled to Southend Airport as I have been told that G-JFWI has now been refitted with new avionics. Rather windy to fly back but apart from this, the weather is not too bad. After instructions on the new avionics I started her up and found the flaps to inoperable. After a quick diagnosis it appears a connector had come apart and once fixed I was on my way. A check with Duxford confirmed that there was 22kts crosswind so a tricky landing ahead. Messed up the first approach so after a go-around the next attempt was much better and parked her up.