Hello, Holiday Rules, and Benefit payment increase.

Hello to everyone who is part of this group and forum. I just joined it today as a subscriber, after thinking about it for some time. Although I once worked for many years for a public service, I have been unemployed with depression/anxiety, and quite frankly feeling very alone and unimportant, as a long term benefit claimant! My best wishes to you all, and to Steve and the other at B&W
I am claiming UC with LCWRA status, and for some time, no commitments following medical assessment some time ago.
I have two questions please, which UC do not seem to be answering very clearly via my 'journal'.
I have not been abroad for a long tie, but later this month, I am going on holiday with a trusted friend, to celebrate modestly, my birthday. I will be in the EU for just 7 days. I am not clear on how this affects my UC payment (two elements), and exactly what and when, I should tell UC about this?
Secondly, I notice that a 10.1% increase is due to happen to my UC monthly payments. I am due to be paid tomorrow, but my 'payments' info on my account show that NO increase has happened yet. My assesment period starts/ends on the 6th. What is happening, and what should I do?
Kind thanks, KG.

Thank you Gary for your reply. You say "If you go abroad, you can continue to get Universal Credit for one month." Are you saying that my UC claim will be closed, one month from the date I 'go abroad'?! That, I will 'only' continue getting UC payment the next month (June)? I am concerned and unclear about your answer. IF this is not the case, then I am still unclear about how my holiday abroad for a week, affects the amounts of money I receive from UC, as I originally asked. Can you please clarify? IF a 7 day holiday in the EU has NO affect on my UC payments, and does NOT terminate my claim, can you please clarify both of these points clearly. Thank you.
AS for the late UC payment increase issue, I am told that because my April assessment period started just before the 10th April, that rate increase only starts applying to my UC period May 6th - June 5th, meaning payment of it in June. Correct?