So I started the friday swim being aware of my elbow and set to the intervals. I managed a few lengths below the 2:00min/100m pace but couldn't crack it for 2 lengths consecutively. I'm quite pleased that I managed to finish with 267m at a very easy 2:30min/100m fairly consistently.
Today I also took the sensible course of action and withdrew from the Dart 10km. There's no way I'm going to be fit enough and I wouldn't want to start wit the intention of dropping out and being cold and wet waiting to be returned to base. There's a goal for 2019. Now I'm thinking that I will stop swimming for a month and see if that helps my elbow.