Long, signed for a six-figure fee from Cork City in January, has yet to be involved in a Burnley matchday eighteen but he did play on trial for 68 minutes of a 3-1 pre-season friendly win for MK Dons at St Neots Town on Saturday afternoon, and he will now spend the week with the Cumbrians at their training camp in Ashby-de-la-Zouch, Leicestershire, Long also at this stage pencilled in to take part in Carlisle's friendly at Darlington on Friday evening.
Elsewhere in United's search for a Livesey replacement, 21-year old French centre-half Jean-Yves M'Voto, who played 82 minutes of Carlisle's 3-0 home pre-season friendly defeat against Newcastle on Saturday has asked for more time to consider his options as he mulls over a potential loan move from Sunderland. M'Voto, unlike Long, not joining the Blues down in Leicestershire this week.