Hi All, I wonder if anyone can help. My upcoming flight to MLE (BA61 out / BA60 back) has a seat map that doesn't appear to match any of the seat maps in this post.

Outbound, we're flying in WTP and the aircraft is listed as 77W in MMB. It has 5 rows in 2-4-2 config; rows 30-34. We've currently selected 32H&K.

Inbound, the aircraft is again listed as a 77W, and we were fortunate enough to find redemption availability for CW. It was a very pleasant surprise to find the seat map showing the new CWS (that will be a first for me!) - but with a seat map that doesn't appear above. It has a mini cabin of 3 rows; rows 5-7, then what looks like a cabin divider (not a galley or toilets), before a larger cabin of 11 rows; rows 8-18, with row 18 only having seats in the centre of the cabin (not at the windows). The toilets are located aft of row 18. We have currently seleced 5K and 6K for the long day flight (we can cope with 11hrs sitting a row apart, we'd rather have a window each!).

Can I ask your opinions on what type of aircraft this is and any seating tips from anyone that has experienced it previously? Dates, if they help, are 4th of November and 12th November.
Thanks all!