What the heck, I went ahead and did it. So this is our revised financial picture:

THE BEFORE PICTURE

Debt before:
HOME DEBT
US Mortgage $160,656
UK Mortgage 1: GBP35487--$70,440
UK Mortgage 2: GBP7481--$14,850
UK Mortgage 3: GBP7877--$15,636
Total home debt $261,582

EDUCATION DEBT
AS SM $10,560
NT DL $15,358
NT FM $5,507
NT Education (estimated future debt) $6,806
Total student loan debt $38,231

TOTAL HOUSEHOLD DEBT $299,813

Assets before:
NT's UK pensions:
#1: 13,884 pounds ($27,768)
#2: 17,268 pounds ($34,536)
#3: 3,709 pounds ($7,418)
NT's 401(k): $20,619
NT's Roth IRA: $4,758
AS's 401(k): $8,210
AS's trad. IRA: $1,682
AS's Roth IRA: $9,444
CJ's 401(k): $48,180
CJ's Roth IRA: $4,758
NT's flat: 130,000 pounds ($260,000)
CJ & AS's condo: $160,000
Emergency fund (shared asset): $18,562
House down payment/moving fund: $2,195
---
Total Assets: $608,130

*****

THE AFTER PICTURE

Debt after:
HOME DEBT
US Mortgage $160,656
UK Mortgage 1: GBP35487--$56,779
UK Mortgage 2: GBP7481--$11,970
UK Mortgage 3: GBP7877--$12,603
Total home debt $242,008

EDUCATION DEBT
AS SM $10,560
NT DL $15,358
NT FM $5,507
NT Education (estimated future debt) $6,806
Total student loan debt $38,231

TOTAL HOUSEHOLD DEBT $280,239
Change: -$19,574 (yay!)

Assets after:
NT's UK pensions:
#1: 13,884 pounds ($22,214)
#2: 17,268 pounds ($27,629)
#3: 3,709 pounds ($5,934)
NT's 401(k): $20,619
NT's Roth IRA: $4,758
AS's 401(k): $8,210
AS's trad. IRA: $1,682
AS's Roth IRA: $9,444
CJ's 401(k): $48,180
CJ's Roth IRA: $4,758
NT's flat: 125,000 pounds ($200,000)
CJ & AS's condo: $145,000
Emergency fund (shared asset): $16,085
House down payment/moving fund: $2,195
---
Total Assets: $516,708
Change: -$91,422 (big ouch!!)