Here, we post helpful Tips and Advice from Keith Sharp.  Keith is an advanced Bridge Player (county standard) who has been running a weekly zoom Bridge advice group since 2020 in the South of England.  He was a prime instigator of a Gentle Bridge Club in Malmesbury, Wiltshire.  He distributes 'notes' after each weekly call-in.  These are copied below, with his permission, each week.  We may edit (slightly) or clarify.  Any additions are italicised

w/e 4th April 2025

Transfers over partner's 2NT opening. Most players these days play Stayman and transfers over a 1NT opening but they are just as useful over a strong 2NT opener. An example last Tuesday illustrated this. Responder had a long and powerful heart suit and elected, correctly, to play in 6 hearts. However, this meant that the 2NT hand was dummy and the opening lead was through it rather than up to it as it would have been if they had been playing transfers. The only loser was the Ace of hearts but dummy had AQ doubleton spade and a spade lead would have necessitated taking the finesse. As it happened a spade wasn't led so the contract made comfortably. If the contract had been transferred to the 2NT hand a spade lead would not involve any risk.

The bidding goes 1 diamond - 1NT and the opener has 17/18 points balanced. Just bid 2NT.  

Opening 1NT with 12-14 points and a 5 card major suit. If you open the major then your rebid is 2 of that suit.  You can't bid 1NT as it shows a stronger hand.  If the suit is not very strong - maybe only 1 honour, then the 1NT opener is best. If the suit is strong then it can stand being rebid.  

'Disturbed' bids.  This refers to a response after your right hand opponent overcalls and makes your life difficult. An example is when partner opens 1 heart and you have 10 points and a 4 card spade suit. With no intervention you bid 1 spade but in this case your opponent overcalled 2 diamonds. If you now bid 2 spades it promises 5 cards as well as 10+ points. The simple solution is to double their 2 diamonds.  This is a negative double promising 4 of the other major. You could do this with fewer than 10 points.

Change of suit after partner opens a weak 2.  You must be strong to do this as with a weaker hand it is best to pass the weak 2.  You should have a very good 6 card suit and the weak 2 opener should raise it with 2 or more cards in your suit.  The bid is forcing for one round.